8603980729344
8,603,980,729,344 is an even composite number composed of seven prime numbers multiplied together.
8603980729344 is an even composite number. It is composed of seven distinct prime numbers multiplied together. It has a total of two thousand, three hundred seventy-six divisors.
Prime factorization of 8603980729344:
210 × 32 × 72 × 11 × 132 × 37 × 277
(2 × 2 × 2 × 2 × 2 × 2 × 2 × 2 × 2 × 2 × 3 × 3 × 7 × 7 × 11 × 13 × 13 × 37 × 277)See below for interesting mathematical facts about the number 8603980729344 from the Numbermatics database.
Names of 8603980729344
- Cardinal: 8603980729344 can be written as Eight trillion, six hundred three billion, nine hundred eighty million, seven hundred twenty-nine thousand, three hundred forty-four.
Scientific notation
- Scientific notation: 8.603980729344 × 1012
Factors of 8603980729344
Divisors of 8603980729344
- Number of divisors d(n): 2376
-
Complete list of divisors:
1 2 3 4 6 7 8 9 11 12 13 14 16 18 21 22 24 26 28 32 33 36 37 39 42 44 48 49 52 56 63 64 66 72 74 77 78 84 88 91 96 98 99 104 111 112 117 126 128 132 143 144 147 148 154 156 168 169 176 182 192 196 198 208 222 224 231 234 252 256 259 264 273 277 286 288 294 296 308 312 333 336 338 352 364 384 392 396 407 416 429 441 444 448 462 468 481 504 507 512 518 528 539 546 554 572 576 588 592 616 624 637 666 672 676 693 704 728 768 777 784 792 814 819 831 832 858 882 888 896 924 936 962 1001 1008 1014 1024 1036 1056 1078 1092 1108 1144 1152 1176 1183 1184 1221 1232 1248 1274 1287 1332 1344 1352 1386 1408 1443 1456 1521 1536 1554 1568 1584 1617 1628 1638 1662 1664 1716 1764 1776 1792 1813 1848 1859 1872 1911 1924 1939 2002 2016 2028 2072 2112 2156 2184 2216 2288 2304 2331 2352 2366 2368 2442 2464 2493 2496 2548 2574 2664 2688 2704 2772 2816 2849 2886 2912 3003 3042 3047 3072 3108 3136 3168 3234 3256 3276 3324 3328 3367 3432 3528 3549 3552 3584 3601 3626 3663 3696 3718 3744 3822 3848 3878 4004 4032 4056 4144 4224 4312 4329 4368 4432 4576 4608 4662 4704 4732 4736 4851 4884 4928 4986 4992 5096 5148 5291 5328 5376 5408 5439 5544 5577 5632 5698 5733 5772 5817 5824 6006 6084 6094 6216 6253 6272 6336 6468 6512 6552 6648 6656 6734 6864 7007 7056 7098 7104 7168 7202 7252 7326 7392 7436 7488 7644 7696 7756 8008 8064 8112 8281 8288 8448 8547 8624 8658 8736 8864 9009 9141 9152 9216 9324 9408 9464 9472 9702 9768 9856 9972 9984 10101 10192 10249 10296 10582 10647 10656 10752 10803 10816 10878 11088 11154 11264 11396 11466 11544 11634 11648 12012 12168 12188 12432 12506 12544 12672 12936 13013 13024 13104 13296 13312 13468 13573 13728 14014 14112 14196 14208 14404 14504 14652 14784 14872 14976 15288 15392 15512 15873 16016 16128 16224 16317 16562 16576 16731 16896 17094 17248 17316 17451 17472 17728 18018 18282 18304 18648 18759 18816 18928 18944 19404 19536 19712 19943 19944 19968 20202 20384 20498 20592 21021 21164 21294 21312 21329 21504 21606 21632 21756 22176 22308 22792 22932 23088 23268 23296 23569 24024 24336 24376 24843 24864 25012 25088 25207 25344 25641 25872 26026 26048 26208 26592 26936 27146 27423 27456 28028 28224 28392 28416 28808 29008 29304 29568 29744 29952 30303 30576 30747 30784 31024 31746 32032 32256 32409 32448 32634 33124 33152 33462 33792 34188 34496 34632 34902 34944 35456 36036 36564 36608 37037 37296 37518 37632 37856 37888 38808 39039 39072 39424 39611 39886 39888 39936 40404 40719 40768 40996 41184 42042 42328 42588 42624 42658 43212 43264 43512 43771 44352 44616 45584 45864 46176 46536 46592 46813 47138 47619 48048 48672 48752 49686 49728 50024 50176 50414 50688 51282 51744 52052 52096 52416 53184 53872 54292 54846 54912 56056 56277 56448 56784 56832 57616 58016 58608 59136 59488 59829 59904 60606 61152 61494 61568 62048 63063 63492 63987 64064 64512 64818 64896 65268 66248 66304 66924 68376 68783 68992 69264 69804 69888 70707 70912 71743 72072 73128 73216 74074 74529 74592 75036 75264 75621 75712 77616 78078 78144 78848 79222 79772 79776 80808 81438 81536 81992 82368 84084 84656 85176 85248 85316 86424 86528 87024 87542 88704 89232 91091 91168 91728 92241 92352 93072 93184 93626 94276 95238 96096 97344 97504 99372 99456 100048 100828 101376 102564 103488 104104 104192 104832 106368 107744 108584 109692 109824 111111 112112 112554 112739 112896 113568 113664 115232 116032 117117 117216 118272 118833 118976 119658 119808 121212 122157 122304 122988 123136 124096 126126 126984 127974 128128 129636 129792 130536 131313 132496 132608 133237 133848 136752 137566 137984 138528 139608 139776 140439 141414 141824 143486 144144 146256 146432 148148 149058 149184 149303 150072 150528 151242 151424 155232 156156 156288 158444 159544 159552 161616 162876 163072 163984 164736 168168 169312 170352 170496 170632 172848 173056 174048 175084 176449 177408 178464 179487 182182 182336 183456 184482 184704 186144 187252 188552 190476 191961 192192 194688 195008 198744 198912 200096 201656 205128 206349 206976 208208 208384 209664 212121 212736 215229 215488 217168 219384 219648 222222 224224 225108 225478 225792 226863 227136 230464 232064 234234 234432 236544 237666 237952 239316 242424 244314 244608 245976 246272 248192 252252 253968 255948 256256 259259 259272 259584 261072 262626 264992 265216 266474 267696 273273 273504 275132 275968 277056 277277 279216 279552 280878 282828 283648 286972 288288 292512 296296 298116 298368 298606 300144 302484 302848 306397 310464 312312 312576 316888 319088 319104 323232 325752 326144 327691 327968 329472 333333 336336 338217 338624 340704 340992 341264 345696 348096 350168 352898 354816 356499 356928 358974 364364 364672 366912 368964 369408 372288 374504 377104 380952 383922 384384 389376 390016 393939 397488 397824 399711 400192 403312 410256 412698 413952 416416 416768 419328 421317 424242 425472 430458 430976 434336 438768 439296 444444 447909 448448 450216 450956 451584 453726 454272 460928 464128 468468 468864 475332 475904 478632 481481 484848 488628 489216 491952 492544 496384 502201 504504 507936 511896 512512 514943 518518 518544 519168 522144 525252 529347 529984 532948 535392 546546 547008 550264 551936 554112 554554 558432 561756 565656 573944 576576 585024 592592 596232 596736 597212 600288 604968 605696 612794 619047 620928 624624 625152 633776 638176 638208 645687 646464 651504 652288 655382 655936 658944 666666 672672 676434 677248 681408 682528 691392 696192 700336 705796 709632 712998 713856 717948 728728 729344 733824 737928 738816 744576 749008 754208 761904 767844 768768 777777 778752 780032 787878 789173 794976 795648 799422 800384 806624 819819 820512 825396 827904 831831 832832 838656 842634 848484 850944 860916 861952 868672 877536 888888 895818 896896 900432 901912 907452 908544 919191 921856 928256 932659 936936 937728 950664 951808 957264 962962 969696 977256 978432 983073 983904 992768 1004402 1009008 1014651 1015872 1023792 1025024 1029886 1037036 1037088 1044288 1050504 1058694 1059968 1065896 1070784 1093092 1094016 1100528 1108224 1109108 1116864 1123512 1131312 1147888 1153152 1170048 1185184 1192464 1193472 1194424 1199133 1200576 1209936 1211392 1225588 1238094 1241856 1249248 1250304 1267552 1276352 1276416 1291374 1292928 1303008 1310764 1311872 1317888 1333332 1343727 1345344 1352868 1354496 1362816 1365056 1382784 1392384 1400672 1411592 1425996 1427712 1435896 1444443 1457456 1458688 1465607 1467648 1475856 1477632 1489152 1498016 1506603 1508416 1523808 1535688 1537536 1544829 1555554 1557504 1560064 1575756 1578346 1588041 1589952 1598844 1600768 1613248 1639638 1641024 1650792 1655808 1663662 1665664 1685268 1696968 1721832 1723904 1732081 1737344 1755072 1777776 1791636 1793792 1800864 1803824 1814904 1817088 1838382 1843712 1856512 1865318 1873872 1875456 1901328 1903616 1914528 1925924 1939392 1940939 1954512 1956864 1966146 1967808 1985536 2008804 2018016 2029302 2031744 2047584 2059772 2074072 2074176 2088576 2101008 2117388 2119936 2131792 2141568 2186184 2188032 2201056 2216448 2218216 2233728 2247024 2262624 2293837 2295776 2306304 2333331 2340096 2367519 2370368 2384928 2386944 2388848 2398266 2401152 2419872 2451176 2476188 2483712 2495493 2498496 2535104 2552704 2552832 2582748 2585856 2606016 2621528 2623744 2666664 2687454 2690688 2705736 2708992 2725632 2730112 2757573 2765568 2784768 2797977 2801344 2823184 2851992 2855424 2871792 2888886 2914912 2917376 2931214 2935296 2949219 2951712 2978304 2996032 3013206 3016832 3047616 3071376 3075072 3089658 3111108 3120128 3151512 3156692 3176082 3179904 3197688 3201536 3226496 3279276 3282048 3301584 3327324 3331328 3370367 3370536 3393936 3443664 3447808 3464162 3474688 3510144 3555552 3583272 3587584 3601728 3604601 3607648 3629808 3634176 3676764 3687424 3730636 3747744 3750912 3802656 3829056 3851848 3878784 3881878 3909024 3932292 3935616 4017608 4036032 4058604 4063488 4095168 4119544 4148144 4148352 4177152 4202016 4234776 4239872 4263584 4283136 4333329 4372368 4376064 4396821 4402112 4432896 4436432 4467456 4494048 4519809 4525248 4587674 4591552 4612608 4634487 4666662 4680192 4735038 4740736 4769856 4777696 4796532 4802304 4839744 4902352 4952376 4967424 4990986 4996992 5070208 5105408 5165496 5171712 5196243 5212032 5243056 5247488 5333328 5374908 5381376 5411472 5417984 5451264 5460224 5515146 5524211 5531136 5569536 5595954 5602688 5646368 5703984 5710848 5743584 5777772 5822817 5829824 5862428 5870592 5898438 5903424 5956608 5992064 6026412 6033664 6095232 6142752 6179316 6222216 6303024 6313384 6352164 6359808 6395376 6403072 6452992 6528613 6558552 6564096 6603168 6654648 6662656 6740734 6741072 6787872 6881511 6887328 6928324 6949376 7020288 7102557 7111104 7166544 7175168 7203456 7209202 7215296 7259616 7353528 7461272 7495488 7605312 7658112 7703696 7757568 7763756 7818048 7864584 7871232 8035216 8072064 8117208 8126976 8190336 8239088 8296288 8296704 8354304 8393931 8404032 8469552 8479744 8527168 8566272 8666658 8744736 8752128 8793642 8804224 8872864 8934912 8988096 9039618 9050496 9175348 9183104 9225216 9268974 9333324 9360384 9470076 9481472 9539712 9555392 9593064 9604608 9679488 9804704 9904752 9981972 9993984 10111101 10140416 10210816 10259249 10330992 10343424 10392486 10424064 10486112 10494976 10666656 10749816 10762752 10813803 10822944 10902528 10920448 11030292 11048422 11062272 11191908 11205376 11292736 11407968 11487168 11555544 11645634 11659648 11724856 11796876 11806848 11984128 12052824 12067328 12124567 12190464 12285504 12358632 12444432 12606048 12626768 12704328 12719616 12790752 12905984 13057226 13117104 13128192 13190463 13206336 13309296 13325312 13481468 13482144 13575744 13763022 13774656 13856648 13898752 14040576 14205114 14222208 14333088 14406912 14418404 14430592 14519232 14707056 14922544 14990976 15210624 15316224 15407392 15515136 15527512 15588729 15636096 15729168 15742464 16070432 16144128 16234416 16253952 16380672 16478176 16572633 16592576 16593408 16708608 16787862 16808064 16939104 17054336 17132544 17333316 17468451 17489472 17587284 17608448 17745728 17869824 17976192 18079236 18100992 18350696 18366208 18537948 18666648 18940152 18962944 19052891 19079424 19110784 19186128 19209216 19358976 19585839 19609408 19809504 19963944 19987968 20222202 20280832 20421632 20518498 20644533 20661984 20784972 20848128 20972224 21333312 21499632 21525504 21627606 21645888 21840896 22060584 22096844 22383816 22410752 22585472 22815936 22974336 23111088 23291268 23319296 23449712 23593752 23613696 23968256 24105648 24134656 24249134 24380928 24571008 24717264 24888864 25212096 25232207 25253536 25408656 25439232 25581504 25811968 26114452 26234208 26256384 26380926 26412672 26618592 26962936 26964288 27151488 27526044 27549312 27713296 28081152 28410228 28444416 28666176 28813824 28836808 28861184 29038464 29414112 29845088 29981952 30333303 30421248 30632448 30777747 30814784 31030272 31055024 31177458 31272192 31458336 31484928 32140864 32288256 32441409 32468832 32761344 32956352 33145266 33185152 33186816 33575724 33616128 33878208 34108672 34666632 34936902 34978944 35174568 35216896 35491456 35952384 36158472 36201984 36373701 36701392 36732416 37075896 37333296 37880304 37925888 38105782 38158848 38221568 38372256 38717952 39171678 39218816 39619008 39927888 39975936 40444404 40561664 41036996 41289066 41323968 41569944 41696256 41944448 42666624 42999264 43255212 43291776 44121168 44193688 44767632 44821504 45170944 45631872 45948672 46222176 46582536 46638592 46899424 47187504 47227392 47936512 48211296 48498268 48761856 49142016 49434528 49717899 49777728 50424192 50464414 50507072 50817312 51163008 52228904 52468416 52761852 52825344 53237184 53925872 53928576 54302976 55052088 55098624 55426592 56820456 56888832 57158673 57332352 57627648 57673616 57722368 58076928 58757517 58828224 59690176 59963904 60666606 60842496 61264896 61555494 61629568 62110048 62354916 62544384 62916672 64281728 64576512 64882818 64937664 65522688 65912704 66290532 66370304 67151448 67232256 67756416 68217344 69333264 69873804 69957888 70349136 70433792 70982912 71814743 71904768 72316944 72403968 72747402 73402784 73464832 74151792 74666592 75696621 75760608 76211564 76317696 76443136 76744512 77435904 78343356 78437632 79238016 79855776 80888808 82073992 82578132 82647936 83139888 83888896 84871969 85333248 85998528 86510424 86583552 88242336 88387376 89535264 90341888 91263744 91897344 92333241 92444352 93165072 93277184 93798848 94375008 94454784 96422592 96996536 98284032 98869056 99435798 99555456 100848384 100928828 101014144 101634624 102326016 104457808 104936832 105523704 105650688 106474368 107851744 107857152 108605952 109121103 110104176 110197248 110853184 113640912 113777664 114317346 114664704 115347232 115444736 116153856 117515034 117656448 119380352 119927808 121333212 121684992 123110988 123259136 124220096 124709832 125088768 125833344 128563456 129765636 129875328 131825408 132581064 132740608 133370237 134302896 134464512 135512832 136434688 138666528 139747608 139915776 140698272 141965824 143629486 143809536 144633888 145494804 146805568 148303584 149333184 151393242 151521216 152423128 152886272 153489024 156686712 156875264 158476032 159711552 161777616 164147984 165156264 165295872 166279776 167777792 169743938 170666496 171476019 171997056 173020848 173167104 176484672 176774752 179070528 180683776 182527488 183794688 184666482 184888704 186330144 187597696 188750016 192845184 193993072 196568064 197738112 198871596 199110912 201696768 201857656 202028288 203269248 204652032 208915616 209873664 211047408 211301376 212948736 215444229 215703488 215714304 217211904 218242206 220208352 220394496 221706368 227089863 227281824 228634692 229329408 230694464 232307712 235030068 235312896 238760704 242666424 246221976 246518272 248440192 249419664 251666688 254615907 257126912 259531272 259750656 263650816 265162128 265481216 266740474 268605792 271025664 277333056 279495216 279831552 281396544 283931648 287258972 289267776 290989608 293611136 296607168 298666368 302786484 303042432 304846256 306978048 313373424 313750528 316952064 319423104 323555232 328295968 330312528 330591744 332559552 335555584 339487876 341332992 342952038 343994112 346041696 346334208 352969344 353549504 358141056 365054976 369332964 369777408 372660288 375195392 377500032 385690368 387986144 395476224 397743192 398221824 400110711 403393536 403715312 404056576 406538496 409304064 417831232 419747328 422094816 425897472 430888458 431406976 431428608 436484412 440416704 443412736 454179726 454563648 457269384 458658816 461388928 470060136 470625792 477521408 485332848 492443952 493036544 496880384 498839328 503333376 509231814 514253824 519062544 519501312 527301632 530324256 533480948 537211584 542051328 554666112 558990432 562793088 574517944 578535552 581979216 587222272 593214336 597332736 605572968 606084864 609692512 613956096 626746848 633904128 638846208 646332687 647110464 656591936 660625056 661183488 665119104 678975752 685904076 687988224 692083392 705938688 707099008 716282112 738665928 739554816 745320576 750390784 755000064 763847721 771380736 775972288 790952448 795486384 796443648 800221422 807430624 808113152 813076992 835662464 839494656 844189632 851794944 861776916 862813952 872968824 880833408 886825472 908359452 909127296 914538768 922777856 933591659 940120272 941251584 955042816 970665696 984887904 993760768 997678656 1006666752 1018463628 1038125088 1039002624 1060648512 1066961896 1074423168 1109332224 1117980864 1125586176 1149035888 1157071104 1163958432 1174444544 1186428672 1194665472 1200332133 1211145936 1212169728 1219385024 1227912192 1253493696 1277692416 1292665374 1294220928 1313183872 1321250112 1330238208 1357951504 1371808152 1375976448 1384166784 1411877376 1414198016 1432564224 1477331856 1479109632 1490641152 1500781568 1510000128 1527695442 1542761472 1551944576 1581904896 1590972768 1600442844 1614861248 1626153984 1671324928 1688379264 1723553832 1725627904 1745937648 1761666816 1773650944 1816718904 1818254592 1829077536 1845555712 1867183318 1880240544 1941331392 1969775808 1987521536 1995357312 2036927256 2076250176 2121297024 2133923792 2148846336 2218664448 2235961728 2251172352 2298071776 2314142208 2327916864 2348889088 2372857344 2389330944 2400664266 2422291872 2424339456 2438770048 2506987392 2555384832 2585330748 2588441856 2626367744 2642500224 2660476416 2715903008 2743616304 2768333568 2800774977 2823754752 2828396032 2865128448 2954663712 2981282304 3020000256 3055390884 3103889152 3181945536 3200885688 3229722496 3342649856 3376758528 3447107664 3451255808 3491875296 3523333632 3633437808 3636509184 3658155072 3691111424 3734366636 3760481088 3882662784 3939551616 3990714624 4073854512 4152500352 4242594048 4267847584 4297692672 4437328896 4471923456 4502344704 4596143552 4628284416 4655833728 4745714688 4801328532 4844583744 4877540096 5013974784 5170661496 5176883712 5252735488 5285000448 5320952832 5431806016 5487232608 5536667136 5601549954 5656792064 5909327424 5962564608 6110781768 6207778304 6363891072 6401771376 6459444992 6685299712 6753517056 6894215328 6983750592 7046667264 7266875616 7273018368 7316310144 7468733272 7520962176 7765325568 7879103232 7981429248 8147709024 8305000704 8402324931 8485188096 8535695168 8595385344 8943846912 9192287104 9311667456 9602657064 9689167488 9755080192 10027949568 10341322992 10353767424 10505470976 10570000896 10863612032 10974465216 11073334272 11203099908 11818654848 12221563536 12415556608 12727782144 12803542752 12918889984 13507034112 13788430656 13967501184 14533751232 14632620288 14937466544 15041924352 15530651136 15758206464 15962858496 16295418048 16610001408 16804649862 16970376192 17071390336 17887693824 18384574208 18623334912 19205314128 19378334976 19510160384 20055899136 20682645984 21140001792 21727224064 21948930432 22406199816 23637309696 24443127072 25455564288 25607085504 25837779968 27576861312 27935002368 29067502464 29265240576 29874933088 30083848704 31061302272 31516412928 32590836096 33220002816 33609299724 34142780672 36769148416 37246669824 38410628256 38756669952 41365291968 43454448128 43897860864 44812399632 47274619392 48886254144 50911128576 51214171008 55153722624 55870004736 58135004928 58530481152 59749866176 60167697408 65181672192 67218599448 68285561344 73538296832 76821256512 77513339904 82730583936 86908896256 87795721728 89624799264 94549238784 97772508288 102428342016 110307445248 111740009472 116270009856 119499732352 130363344384 134437198896 136571122688 153642513024 165461167872 175591443456 179249598528 195545016576 204856684032 220614890496 232540019712 238999464704 260726688768 268874397792 307285026048 330922335744 358499197056 391090033152 409713368064 477998929408 537748795584 614570052096 661844671488 716998394112 782180066304 955997858816 1075497591168 1229140104192 1433996788224 2150995182336 2867993576448 4301990364672 8603980729344
- Sum of all divisors σ(n): 35188177899888
- Sum of proper divisors (its aliquot sum) s(n): 26584197170544
- 8603980729344 is an abundant number, because the sum of its proper divisors (26584197170544) is greater than itself. Its abundance is 17980216441200
Bases of 8603980729344
- Binary: 11111010011010001010011011100001100000000002
- Hexadecimal: 0x7D345370C00
- Base-36: 31SM3Z7K0
Squares and roots of 8603980729344
- 8603980729344 squared (86039807293442) is 74028484390922910182670336
- 8603980729344 cubed (86039807293443) is 636939653122043820366770921806793539584
-
The
square root of 8603980729344 is 2933254.2899216903 -
The
cube root of 8603980729344 is 20491.1567880929
Scales and comparisons
How big is 8603980729344?- 8,603,980,729,344 seconds is equal to 273,579 years, 50 weeks, 4 days, 7 hours, 2 minutes, 24 seconds.
-
To count from 1 to 8,603,980,729,344 would take you about six hundred eighty-three thousand, nine hundred forty-nine 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 8603980729344 cubic inches would be around 1707.6 feet tall.
Recreational maths with 8603980729344
- 8603980729344 backwards is 4439270893068
- 8603980729344 is a
Harshad number . - The number of decimal digits it has is: 13
- The sum of 8603980729344's digits is 63
- 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 8603980729344 - Facts about the integer". Numbermatics.com. 2024. Web. 14 June 2024.
APA style:
Numbermatics. (2024). Number 8603980729344 - Facts about the integer. Retrieved 14 June 2024, from https://numbermatics.com/n/8603980729344/
Chicago style:
Numbermatics. 2024. "Number 8603980729344 - Facts about the integer". https://numbermatics.com/n/8603980729344/
The information we have on file for 8603980729344 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 8603980729344, math, Factors of 8603980729344, curriculum, school, college, exams, university, Prime factorization of 8603980729344, STEM, science, technology, engineering, physics, economics, calculator, eight trillion, six hundred three billion, nine hundred eighty million, seven hundred twenty-nine thousand, three hundred forty-four.