570108752659673040
570,108,752,659,673,040 is an even composite number composed of nine prime numbers multiplied together.
What does the number 570108752659673040 look like?
This visualization shows the relationship between its 9 prime factors (large circles) and 1920 divisors.
570108752659673040 is an even composite number. It is composed of nine distinct prime numbers multiplied together. It has a total of one thousand, nine hundred twenty divisors.
Prime factorization of 570108752659673040:
24 × 3 × 5 × 112 × 113 × 181 × 227 × 257 × 16453
(2 × 2 × 2 × 2 × 3 × 5 × 11 × 11 × 113 × 181 × 227 × 257 × 16453)See below for interesting mathematical facts about the number 570108752659673040 from the Numbermatics database.
Names of 570108752659673040
- Cardinal: 570108752659673040 can be written as Five hundred seventy quadrillion, one hundred eight trillion, seven hundred fifty-two billion, six hundred fifty-nine million, six hundred seventy-three thousand and forty.
Scientific notation
- Scientific notation: 5.7010875265967304 × 1017
Factors of 570108752659673040
Divisors of 570108752659673040
- Number of divisors d(n): 1920
-
Complete list of divisors:
1 2 3 4 5 6 8 10 11 12 15 16 20 22 24 30 33 40 44 48 55 60 66 80 88 110 113 120 121 132 165 176 181 220 226 227 240 242 257 264 330 339 362 363 440 452 454 484 514 528 543 565 605 660 678 681 724 726 771 880 904 905 908 968 1028 1086 1130 1135 1210 1243 1285 1320 1356 1362 1448 1452 1542 1695 1808 1810 1815 1816 1936 1991 2056 2172 2260 2270 2420 2486 2497 2570 2640 2712 2715 2724 2827 2896 2904 3084 3390 3405 3620 3630 3632 3729 3855 3982 4112 4344 4520 4540 4840 4972 4994 5140 5424 5430 5448 5654 5808 5973 6168 6215 6780 6810 7240 7260 7458 7491 7710 7964 8481 8688 9040 9080 9680 9944 9955 9988 10280 10860 10896 11308 11946 12336 12430 12485 13560 13620 13673 14135 14480 14520 14916 14982 15420 15928 16453 16962 18160 18645 19888 19910 19976 20453 20560 21720 21901 22616 23892 24860 24970 25651 27120 27240 27346 27467 28270 29040 29041 29832 29865 29964 30840 31097 31856 32906 33924 37290 37455 39820 39952 40906 41019 41087 42405 43440 43802 45232 46517 47784 49359 49720 49940 51302 54480 54692 54934 56540 58082 58339 59664 59730 59928 61359 61680 62194 65703 65812 67848 68365 74580 74910 76953 79640 81812 82038 82174 82265 82401 84810 87123 87604 93034 93291 95568 98718 99440 99880 102265 102604 109384 109505 109868 113080 116164 116678 119460 119856 122718 123261 124388 128255 131406 131624 135696 136730 137335 139551 145205 149160 149820 153906 155485 159280 163624 164076 164348 164530 164802 169620 174246 175017 175208 180983 186068 186582 197436 199760 204530 205095 205208 205435 218768 219010 219736 224983 226160 232328 232585 233356 238920 245436 246522 246795 248776 256510 262812 263248 273460 274670 279102 282161 290410 291695 298320 299640 306795 307812 310970 319451 327248 328152 328515 328696 329060 329604 339240 348492 350034 350416 361966 372136 373164 384765 394872 409060 410190 410416 410870 412005 435615 438020 439472 449966 451957 464656 465170 466455 466712 477840 490872 493044 493590 497552 511687 513020 525624 542949 546920 549340 558204 564322 580820 583390 599280 613590 615624 616305 621940 638902 641729 656304 657030 657392 658120 659208 674949 678480 696984 697755 700068 723932 744272 746328 769530 789744 818120 820380 821740 824010 846483 871230 875085 876040 899932 903914 904915 930340 932910 933424 958353 981744 986088 987180 1023374 1026040 1051248 1085898 1093840 1098680 1116408 1124915 1128644 1161640 1166780 1227180 1231248 1232610 1243880 1277804 1283458 1314060 1316240 1318416 1349898 1355871 1393968 1395510 1400136 1410805 1447864 1492656 1535061 1539060 1597255 1636240 1640760 1643480 1648020 1692966 1742460 1750170 1752080 1799864 1807828 1809830 1859189 1860680 1865820 1916706 1925187 1972176 1974360 1990813 2046748 2052080 2171796 2197360 2232816 2249830 2257288 2259785 2323280 2333560 2454360 2465220 2474813 2487760 2555608 2558435 2566916 2628120 2699796 2711742 2714745 2791020 2800272 2821610 2895728 2977993 3070122 3078120 3103771 3194510 3208645 3281520 3286960 3296040 3374745 3385932 3484920 3500340 3513961 3599728 3615656 3619660 3718378 3721360 3731640 3734831 3833412 3850374 3948720 3981626 4093496 4228421 4232415 4343592 4499660 4514576 4519570 4642831 4667120 4791765 4908720 4930440 4949626 4971527 5111216 5116870 5133832 5256240 5256421 5399592 5423484 5429490 5577567 5582040 5628557 5643220 5955986 5972439 6140244 6156240 6207542 6389020 6417290 6592080 6592307 6749490 6771864 6779355 6969840 7000680 7027922 7059019 7231312 7239320 7424439 7436756 7463280 7469662 7666824 7675305 7700748 7963252 8186992 8456842 8464830 8687184 8933979 8999320 9039140 9285662 9295945 9311313 9583530 9625935 9860880 9899252 9943054 9954065 10233740 10267664 10512842 10541883 10559359 10799184 10846968 10858980 11155134 11164080 11204493 11257114 11286440 11911972 11944878 12280488 12374065 12415084 12685263 12778040 12834580 13184614 13498980 13543728 13558710 13928493 14001360 14055844 14118038 14478640 14848878 14873512 14889965 14914581 14939324 15333648 15350610 15401496 15518855 15769263 15926504 16885671 16913684 16929660 17569805 17867958 17998640 18078280 18571324 18591890 18622626 18674155 19167060 19251870 19776921 19798504 19886108 19908130 20451079 20467480 21025684 21083766 21118718 21142105 21177057 21693936 21717960 22310268 22408986 22514228 22572880 23214155 23823944 23889756 24560976 24748130 24830168 24857635 25370526 25556080 25669160 26282105 26369228 26997960 27117420 27856986 27887835 28111688 28142785 28236076 29697756 29747024 29779930 29829162 29862195 29878648 30701220 30802992 31037710 31538526 31678077 31853008 32757923 32961535 33771342 33827368 33859320 35139610 35295095 35735916 36156560 37122195 37142648 37183780 37245252 37348310 38334120 38503740 39553842 39597008 39772216 39816260 40902158 40934960 41083141 42051368 42167532 42237436 42284210 42354114 43435920 44620536 44669895 44817972 45028456 46428310 46512631 46556565 47647888 47779512 49496260 49660336 49715270 50741052 51071141 51338320 52564210 52709415 52738456 52796795 53995920 54234840 55713972 55775670 56022465 56223376 56285570 56472152 57820631 59395512 59559860 59658324 59724390 59757296 61353237 61402440 62075420 63077052 63356154 63426315 65515846 65923070 67542684 67654736 67718640 69642465 70279220 70590190 71471832 72515377 74244390 74285296 74367560 74490504 74572905 74696620 76668240 77007480 78846315 79107684 79544432 79632520 81804316 82166282 84102736 84335064 84428355 84474872 84568420 84708228 89241072 89339790 89635944 90056912 92856620 93025262 93113130 95559024 98273769 98884605 98992520 99430540 101482104 102142282 102255395 105128420 105418830 105476912 105593590 105885285 108469680 111427944 111551340 112044930 112571140 112944304 115641262 116152949 118791024 119119720 119316648 119448780 122706474 122804880 123249423 124150840 126154104 126712308 126852630 131031692 131846140 135085368 139284930 139537893 140558440 141180380 142943664 145030754 148488780 148735120 148981008 149145810 149393240 153213423 154014960 157692630 158215368 158390385 159265040 163608632 163789615 164332564 168670128 168856710 168949744 169136840 169416456 173461893 178679580 179271888 185713240 186050524 186226260 196547538 197769210 197985040 198861080 202964208 204284564 204510790 205415705 210256840 210837660 211187180 211770570 217546131 222855888 223102680 224089860 224961869 225142280 231282524 232305898 232563155 238239440 238633296 238897560 245412948 246498846 248301680 252308208 253424616 253705260 255355705 262063384 263692280 270170736 278569860 279075786 281116880 282360760 289103155 290061508 296977560 298291620 298786480 306426846 306766185 315385260 316430736 316780770 327217264 327579230 328665128 336513209 337713420 338273680 338832912 346923786 348458847 357359160 360337153 362576885 371426480 372101048 372452520 393095076 395538420 397722160 408569128 409021580 410831410 420513680 421675320 422035903 422374360 423541140 435092262 446205360 448179720 449923738 450284560 451914551 462565048 464611796 465126310 477795120 477811573 490825896 491368845 492997692 506849232 507410520 510711410 511638941 524126768 527384560 557139720 558151572 561782551 564721520 578206310 580123016 580764745 593955120 596583240 612853692 613532370 616247115 630770520 633561540 636026941 655158460 657330256 673026418 674885607 675426840 676004411 693847572 696917694 697689465 714718320 720674306 725153770 744202096 744905040 765344201 766067115 786190152 791076840 797669147 817138256 818043160 821662820 843350640 844071806 844748720 847082280 867309465 870184524 896359440 899847476 903829102 925130096 929223592 930252620 955623146 959851567 981651792 982737690 985995384 1009539627 1014821040 1021422820 1023277882 1081011459 1087730655 1114279440 1116303144 1123565102 1124809345 1156412620 1160246032 1161529490 1193166480 1193207567 1225707384 1227064740 1232494230 1261541040 1266107709 1267123080 1272053882 1277682439 1310316920 1346052836 1349771214 1350853680 1352008822 1355743653 1387695144 1393835388 1395378930 1433434719 1441348612 1450307540 1530688402 1532134230 1534916823 1572380304 1582153680 1595338294 1636086320 1643325640 1682566045 1685347653 1688143612 1694164560 1734618930 1740369048 1742294235 1799694952 1801685765 1807658204 1858447184 1860505240 1908080823 1911246292 1919703134 1965475380 1971990768 2019079254 2028013233 2042845640 2046555764 2110179515 2162022918 2175461310 2232606288 2247130204 2249618690 2259572755 2296032603 2312825240 2323058980 2386415134 2389057865 2393007441 2451414768 2454129480 2464988460 2532215418 2534246160 2544107764 2555364878 2558194705 2620633840 2692105672 2699542428 2704017644 2711487306 2775390288 2787670776 2790757860 2808912755 2866869438 2879554701 2882697224 2900615080 3061376804 3064268460 3069833646 3180134705 3190676588 3286651280 3365132090 3370695306 3374428035 3376287224 3380022055 3469237860 3480738096 3484588470 3579622701 3599389904 3603371530 3615316408 3701645299 3721010480 3816161646 3822492584 3826721005 3833047317 3839406268 3930950760 3988345735 4038158508 4056026466 4085691280 4093111528 4220359030 4324045836 4350922620 4494260408 4499237380 4519145510 4592065206 4625650480 4642394933 4646117960 4772830268 4778115730 4786014882 4799257835 4908258960 4929976920 5047698135 5064430836 5088215528 5110729756 5116389410 5255927303 5384211344 5399084856 5405057295 5408035288 5422974612 5575341552 5581515720 5617825510 5733738876 5759109402 5765394448 5801230160 5966037835 6122753608 6128536920 6139667292 6330538545 6360269410 6381353176 6388412195 6730264180 6741390612 6748856070 6752574448 6760044110 6778718265 6938475720 6969176940 7159245402 7167173595 7206743060 7230632816 7403290598 7436048521 7632323292 7644985168 7653442010 7666094634 7674584115 7678812536 7861901520 7976691470 8076317016 8112052932 8186223056 8418786211 8426738265 8440718060 8648091672 8701845240 8988520816 8998474760 9038291020 9184130412 9284789866 9292235920 9540404115 9545660536 9556231460 9572029764 9598515670 9859953840 10095396270 10128861672 10140066165 10176431056 10221459512 10232778820 10511854606 10558367237 10798169712 10810114590 10816070576 10845949224 11104935897 11163031440 11235651020 11467477752 11480163015 11518218804 11932075670 11965037205 12245507216 12257073840 12279334584 12661077090 12720538820 12762706352 12776824390 13125283237 13460528360 13482781224 13497712140 13520088220 13557436530 13876951440 13927184799 13938353880 14318490804 14334347190 14397773505 14413486120 14806581196 14872097042 15264646584 15306884020 15332189268 15349168230 15357625072 15767781909 15953382940 16152634032 16224105864 16837572422 16853476530 16881436120 17296183344 17403690480 17898113505 17996949520 18076582040 18368260824 18508226495 18569579732 19080808230 19091321072 19112462920 19144059528 19165236585 19197031340 20190792540 20257723344 20280132330 20442919024 20465557640 21023709212 21116734474 21620229180 21691898448 22209871794 22308145563 22471302040 22934955504 22960326030 23036437608 23211974665 23864151340 23930074410 24558669168 25256358633 25322154180 25441077640 25553648780 26250566474 26279636515 26921056720 26965562448 26995424280 27040176440 27114873060 27854369598 27876707760 28636981608 28668694380 28795547010 28826972240 29613162392 29744194084 30529293168 30613768040 30664378536 30698336460 31535563818 31675101711 31906765880 32448211728 33675144844 33706953060 33762872240 35796227010 36153164080 36736521648 37016452990 37139159464 37180242605 38161616460 38224925840 38288119056 38330473170 38394062680 39375849711 40381585080 40560264660 40718098289 40931115280 42047418424 42093931055 42233468948 43240458360 44419743588 44616291126 44942604080 45920652060 46072875216 46423949330 47728302680 47860148820 50512717266 50644308360 50882155280 51066344263 51107297560 52501132948 52559273030 52791836185 53990848560 54080352880 54229746120 55524679485 55708739196 57273963216 57337388760 57591094020 57815200333 59226324784 59488388168 61227536080 61328757072 61396672920 63071127636 63350203422 63813531760 65626416185 67350289688 67413906120 69635923995 71592454020 74032905980 74278318928 74360485210 76323232920 76388498443 76660946340 76788125360 78751699422 78838909545 80763170160 81120529320 81436196578 81796533731 84094836848 84187862110 84466937896 86480916720 86483894713 88839487176 89232582252 91841304120 92606648321 92847898660 95456605360 95720297640 101025434532 101288616720 102132688526 102214595120 105002265896 105118546060 105583672370 108459492240 108463227071 111049358970 111417478392 111540727815 114674777520 115182188040 115630400666 116142039607 118976776336 122154294867 122793345840 126142255272 126281793165 126700406844 131252832370 134700579376 134827812240 139271847990 143184908040 144378115607 148065811960 148720970420 152646465840 152776996886 153199032789 153321892680 157503398844 157677819090 158375508555 162241058640 162872393156 163593067462 168375724220 168933875792 172967789426 173445600999 173733133627 177678974352 178465164504 183682608240 185213296642 185695797320 191440595280 196879248555 202050869064 203590491445 204265377052 210004531792 210237092120 211167344740 216926454142 222098717940 222834956784 223081455630 229165495329 230364376080 231260801332 232284079214 244308589734 245389601193 252284510544 252563586330 253400813688 255331721315 259451684139 262505664740 277819944963 278543695980 286369816080 288756231214 289076001665 296131623920 297441940840 305553993772 306398065578 306643785360 315006797688 315355638180 316751017110 325389681213 325744786312 327186134924 336751448440 345935578852 346891201998 347466267254 348426118821 356930329008 370426593284 371391594640 381942492215 393758497110 404101738128 407180982890 408530754104 408982668655 420474184240 422334689480 432419473565 433134346821 433852908284 444197435880 446162911260 458330990658 462521602664 463033241605 464568158428 488617179468 490779202386 505127172660 506801627376 510663442630 518903368278 521199400881 525011329480 542316135355 555639889926 557087391960 577512462428 578152003330 580710198035 594883881680 610771474335 611107987544 612796131156 630013595376 630711276360 633502034220 650779362426 651489572624 654372269848 673502896880 691871157704 693782403996 694932534508 696852237642 721890578035 740853186568 763884984430 765995163945 787516994220 814361965780 817061508208 817965337310 840273482873 844669378960 864838947130 866268693642 867228004995 867705816568 868665668135 888394871760 892325822520 916661981316 925043205328 926066483210 929136316856 951322841843 977234358936 981558404772 1010254345320 1021326885260 1037806736556 1042398801762 1050022658960 1084632270710 1111279779852 1114174783920 1145827476645 1155024924856 1156304006660 1161420396070 1193095497781 1221542948670 1222215975088 1225592262312 1226948005965 1261422552720 1267004068440 1297258420695 1301558724852 1308744539696 1383742315408 1387564807992 1389099724815 1389865069016 1393704475284 1443781156070 1481706373136 1527769968860 1531990327890 1575033988440 1626948406065 1628723931560 1635930674620 1680546965746 1729677894260 1732537387284 1734456009990 1735411633136 1737331336270 1742130594105 1784651645040 1833323962632 1852132966420 1858272633712 1902645683686 1911064469897 1954468717872 1963116809544 2020508690640 2042653770520 2075613473112 2084797603524 2165671734105 2169264541420 2222559559704 2291654953290 2310049849712 2312608013320 2322840792140 2386190995562 2443085897340 2451184524624 2453896011930 2520820448619 2534008136880 2594516841390 2603117449704 2605997004405 2775129615984 2778199449630 2779730138032 2787408950568 2853968525529 2887562312140 3055539937720 3063980655780 3150067976880 3253896812130 3257447863120 3271861349240 3361093931492 3459355788520 3465074774568 3468912019980 3474662672540 3484261188210 3579286493343 3666647925264 3704265932840 3805291367372 3822128939794 3926233619088 4085307541040 4151226946224 4169595207048 4201367414365 4331343468210 4338529082840 4445119119408 4583309906580 4625216026640 4645681584280 4756614209215 4772381991124 4886171794680 4907792023860 5041640897238 5189033682780 5206234899408 5211994008810 5556398899260 5574817901136 5707937051058 5733193409691 5775124624280 5965477488905 6111079875440 6127961311560 6507793624260 6543722698480 6722187862984 6918711577040 6930149549136 6937824039960 6949325345080 6968522376420 7158572986686 7408531865680 7610582734744 7644257879588 8339190414096 8402734828730 8662686936420 8677058165680 9166619813160 9243008311603 9291363168560 9513228418430 9544763982248 9555322349485 9772343589360 9815584047720 10083281794476 10378067365560 10423988017620 10464551260273 11112797798520 11415874102116 11466386819382 11550249248560 11930954977810 12255922623120 12604102243095 13015587248520 13124050475591 13444375725968 13875648079920 13898650690160 13937044752840 14269842627645 14317145973372 15221165469488 15288515759176 16805469657460 17325373872840 17896432466715 18333239626320 18486016623206 19026456836860 19089527964496 19110644698970 19631168095440 19631844099851 20166563588952 20756134731120 20847976035240 20929102520546 21021709168867 22225595597040 22831748204232 22932773638764 23861909955620 25208204486190 26031174497040 26248100951182 27729024934809 27874089505680 28539685255290 28634291946744 28665967048455 30577031518352 31393653780819 33610939314920 34650747745680 35792864933430 36972033246412 38052913673720 38221289397940 39263688199702 39372151426773 40333127177904 41695952070480 41858205041092 42043418337734 45663496408464 45865547277528 46215041558015 47723819911240 50416408972380 52322756301365 52496201902364 55458049869618 57079370510580 57268583893488 57331934096910 58895532299553 62787307561638 63065127506601 65620252377955 67221878629840 71585729866860 73944066492824 76105827347440 76442578795880 78527376399404 78744302853546 83716410082184 84086836675468 91731094555056 92430083116030 95447639822480 98159220499255 100832817944760 104645512602730 104992403804728 105108545844335 110916099739236 114158741021160 114663868193820 117791064599106 125574615123276 126130255013202 131240504755910 138645124674045 143171459733720 147888132985648 152885157591760 156968268904095 157054752798808 157488605707092 167432820164368 168173673350936 184860166232060 196318440998510 196860757133865 201665635889520 209291025205460 209984807609456 210217091688670 215950285098361 221832199478472 228317482042320 229327736387640 235582129198212 251149230246552 252260510026404 262481009511820 277290249348090 286342919467440 294477661497765 313936537808190 314109505597616 314977211414184 315325637533005 336347346701872 369720332464120 392636881997020 393721514267730 418582050410920 420434183377340 431900570196722 443664398956944 458655472775280 471164258396424 502298460493104 504521020052808 524962019023640 554580498696180 588955322995530 627873075616380 629954422828368 630651275066010 647850855295083 739440664928240 785273763994040 787443028535460 837164100821840 840868366754680 863801140393444 942328516792848 1009042040105616 1049924038047280 1079751425491805 1109160997392360 1177910645991060 1255746151232760 1261302550132020 1295701710590166 1570547527988080 1574886057070920 1681736733509360 1727602280786888 2159502850983610 2218321994784720 2355821291982120 2375453136081971 2511492302465520 2522605100264040 2591403421180332 3149772114141840 3239254276475415 3455204561573776 4319005701967220 4711642583964240 4750906272163942 5045210200528080 5182806842360664 6478508552950830 7126359408245913 8638011403934440 9501812544327884 10365613684721328 11877265680409855 12957017105901660 14252718816491826 17276022807868880 19003625088655768 23754531360819710 25914034211803320 28505437632983652 35631797041229565 38007250177311536 47509062721639420 51828068423606640 57010875265967304 71263594082459130 95018125443278840 114021750531934608 142527188164918260 190036250886557680 285054376329836520 570108752659673040
- Sum of all divisors σ(n): 1987132661850825216
- Sum of proper divisors (its aliquot sum) s(n): 1417023909191152176
- 570108752659673040 is an abundant number, because the sum of its proper divisors (1417023909191152176) is greater than itself. Its abundance is 846915156531479136
Bases of 570108752659673040
- Binary: 111111010010110111011100011110101011001111011101111110100002
- Hexadecimal: 0x7E96EE3D59EEFD0
- Base-36: 4BXIOPC9S4PC
Squares and roots of 570108752659673040
- 570108752659673040 squared (5701087526596730402) is 325023989859168251560060679702841600
- 570108752659673040 cubed (5701087526596730403) is 185299021443080631118254939527768726593723014910464000
-
The
square root of 570108752659673040 is 755055463.3003280509 -
The
cube root of 570108752659673040 is 829187.1621620923
Scales and comparisons
How big is 570108752659673040?- 570,108,752,659,673,040 seconds is equal to 18,127,694,872 years, 21 weeks, 6 days, 44 minutes.
-
To count from 1 to 570,108,752,659,673,040 would take you about fifty-four billion, three hundred eighty-three million, eighty-four thousand, six hundred seventeen years!
This is a very rough estimate, based on a speaking rate of half a second every third order of magnitude. If you speak quickly, you could probably say any randomly-chosen number between one and a thousand in around half a second. Very big numbers obviously take longer to say, so we add half a second for every extra x1000. (We do not count involuntary pauses, bathroom breaks or the necessity of sleep in our calculation!)
- A cube with a volume of 570108752659673040 cubic inches would be around 69098.9 feet tall.
Recreational maths with 570108752659673040
- 570108752659673040 backwards is 040376956257801075
- The number of decimal digits it has is: 18
- The sum of 570108752659673040's digits is 75
- More coming soon!
Link to this page
HTML: To link to this page, just copy and paste the link below into your blog, web page or email.
BBCODE: To link to this page in a forum post or comment box, just copy and paste the link code below:
Cite this page
MLA style:
"Number 570108752659673040 - Facts about the integer". Numbermatics.com. 2024. Web. 19 June 2024.
APA style:
Numbermatics. (2024). Number 570108752659673040 - Facts about the integer. Retrieved 19 June 2024, from https://numbermatics.com/n/570108752659673040/
Chicago style:
Numbermatics. 2024. "Number 570108752659673040 - Facts about the integer". https://numbermatics.com/n/570108752659673040/
The information we have on file for 570108752659673040 includes mathematical data and numerical statistics calculated using standard algorithms and methods. We are adding more all the time. If there are any features you would like to see, please contact us. Information provided for educational use, intellectual curiosity and fun!
Keywords: Divisors of 570108752659673040, math, Factors of 570108752659673040, curriculum, school, college, exams, university, Prime factorization of 570108752659673040, STEM, science, technology, engineering, physics, economics, calculator, five hundred seventy quadrillion, one hundred eight trillion, seven hundred fifty-two billion, six hundred fifty-nine million, six hundred seventy-three thousand and forty.