50731751510440
50,731,751,510,440 is an even composite number composed of eight prime numbers multiplied together.
50731751510440 is an even composite number. It is composed of eight distinct prime numbers multiplied together. It has a total of two thousand, three hundred four divisors.
Prime factorization of 50731751510440:
23 × 5 × 73 × 112 × 132 × 19 × 31 × 307
(2 × 2 × 2 × 5 × 7 × 7 × 7 × 11 × 11 × 13 × 13 × 19 × 31 × 307)See below for interesting mathematical facts about the number 50731751510440 from the Numbermatics database.
Names of 50731751510440
- Cardinal: 50731751510440 can be written as Fifty trillion, seven hundred thirty-one billion, seven hundred fifty-one million, five hundred ten thousand, four hundred forty.
Scientific notation
- Scientific notation: 5.073175151044 × 1013
Factors of 50731751510440
Divisors of 50731751510440
- Number of divisors d(n): 2304
-
Complete list of divisors:
1 2 4 5 7 8 10 11 13 14 19 20 22 26 28 31 35 38 40 44 49 52 55 56 62 65 70 76 77 88 91 95 98 104 110 121 124 130 133 140 143 152 154 155 169 182 190 196 209 217 220 242 245 247 248 260 266 280 286 307 308 310 338 341 343 364 380 385 392 403 418 434 440 455 484 490 494 520 532 539 572 589 605 614 616 620 637 665 676 682 686 715 728 760 770 806 836 845 847 868 910 931 968 980 988 1001 1045 1064 1078 1085 1144 1178 1183 1210 1228 1235 1240 1274 1330 1352 1364 1372 1430 1463 1519 1535 1540 1573 1612 1672 1690 1694 1705 1715 1729 1736 1820 1859 1862 1960 1976 2002 2015 2090 2149 2156 2170 2299 2356 2366 2387 2420 2456 2470 2548 2660 2695 2717 2728 2744 2821 2860 2926 2945 3038 3070 3080 3146 3185 3211 3224 3377 3380 3388 3410 3430 3458 3640 3718 3724 3751 3773 3991 4004 4030 4123 4180 4235 4298 4312 4340 4433 4459 4598 4655 4712 4732 4774 4840 4940 5005 5096 5239 5320 5390 5434 5642 5720 5833 5852 5890 5915 5929 6076 6140 6292 6370 6422 6479 6517 6754 6760 6776 6820 6860 6916 7007 7315 7436 7448 7502 7546 7595 7657 7865 7982 8008 8060 8246 8281 8360 8470 8596 8645 8680 8866 8918 9196 9295 9310 9464 9517 9548 9880 10010 10241 10478 10633 10745 10780 10868 11011 11284 11495 11666 11704 11780 11830 11858 11935 12103 12152 12280 12584 12740 12844 12958 13013 13034 13508 13585 13640 13720 13832 14014 14105 14630 14872 15004 15043 15092 15190 15314 15730 15964 16055 16093 16120 16492 16562 16709 16885 16940 17192 17290 17732 17836 18392 18590 18620 18755 18865 19019 19034 19096 19747 19955 20020 20449 20482 20615 20956 21266 21490 21560 21736 22022 22165 22295 22477 22568 22990 23332 23560 23639 23660 23716 23870 24206 25480 25688 25916 26026 26068 26195 26257 27016 27170 27937 28028 28210 28861 29165 29260 29645 29887 30008 30086 30184 30380 30628 31031 31460 31928 32110 32186 32395 32585 32984 33124 33418 33770 33880 34580 35035 35321 35464 35672 36673 37147 37180 37240 37510 37730 38038 38068 38285 39494 39910 40040 40831 40898 40964 41230 41405 41503 41912 42532 42980 43901 44044 44330 44590 44954 45353 45980 46664 47278 47320 47432 47585 47740 48412 48763 49049 51205 51832 51883 52052 52136 52390 52514 53165 53599 54340 55055 55874 56056 56420 57629 57722 57967 58330 58520 59290 59774 60172 60515 60760 61256 62062 62920 64163 64220 64372 64790 65065 65170 66248 66619 66836 67540 69160 70070 70642 71269 71687 73346 74294 74360 75020 75215 75460 75829 76076 76136 76570 77077 78988 79820 80465 81662 81796 81928 82460 82810 83006 83545 84227 84721 85064 85960 87802 88088 88660 89180 89908 90706 91091 91960 94556 95095 95170 95480 96824 97526 98098 98735 99541 102245 102410 103766 104104 104687 104780 105028 105301 106330 107198 108680 110110 111748 112385 112651 112840 115258 115444 115934 116660 116963 118195 118580 119548 120344 121030 123721 124124 128326 128440 128744 129580 130130 130340 131285 133133 133238 133672 135080 138229 139685 140140 141284 142538 143143 143374 144305 146692 148588 149435 150040 150430 150920 151658 152152 153140 154154 155155 157339 157976 159640 160930 163324 163592 164920 165473 165620 166012 167090 168454 169442 175604 176605 177320 178360 179816 180823 181412 182182 183365 183799 185735 189112 190190 190340 195052 195559 196196 197470 199082 202027 204155 204490 204820 207515 207532 209209 209374 209560 210056 210602 212660 214396 217217 219505 220220 223496 224770 225302 226765 230516 230888 231868 233320 233926 236390 237160 239096 242060 243815 245245 247247 247442 248248 256652 256711 259160 259415 260029 260260 260680 262570 266266 266476 267995 276458 279370 280280 282568 285076 285817 286286 286748 288145 288610 289835 293384 297176 298870 300860 303316 306280 307307 308308 310310 314678 317471 320815 321860 326648 330946 331240 332024 333095 334180 336908 338884 341341 351208 353210 356345 358435 361646 362824 363181 364364 366730 367598 371470 375193 379145 380380 380680 385385 388531 390104 391118 392392 394940 398164 403403 404054 408310 408980 409640 415030 415064 418418 418748 421135 421204 423605 425320 428792 434434 439010 440440 449141 449540 450604 453530 455455 461032 463736 466333 467852 472780 482911 484120 487630 490490 494494 494884 497705 498883 513304 513422 518830 520058 520520 523435 525140 526505 530803 532532 532952 535990 539539 552916 558740 563255 570152 570713 571634 572572 573496 576290 577220 579670 584815 589589 597740 601720 606632 614614 616616 618605 620620 629356 633919 634942 637637 641630 643720 661892 665665 666190 668360 673816 677768 682682 691145 696787 705793 706420 712690 715715 716870 723292 726362 728728 732809 733460 735196 742940 750386 758290 760760 770770 777062 782236 786695 788557 789880 796328 806806 808108 816620 817960 827365 830060 834119 836836 837496 842270 842408 847210 866047 868868 878020 898282 899080 901208 904115 907060 910910 918995 926497 931931 932666 935704 945560 965822 975260 977795 980980 985777 988988 989768 995410 997766 1002001 1010135 1026844 1037660 1040116 1046045 1046870 1050280 1053010 1061606 1065064 1071980 1079078 1086085 1094951 1101373 1105832 1117480 1126510 1141426 1143268 1145144 1151557 1152580 1154440 1158311 1159340 1169630 1179178 1195480 1229228 1236235 1237210 1241240 1258712 1265761 1267838 1269884 1275274 1283260 1283555 1286593 1300145 1323784 1331330 1332380 1360931 1365364 1368913 1382290 1393574 1411586 1412840 1425380 1429085 1431430 1433740 1446584 1452724 1464463 1465618 1466920 1470392 1485880 1500772 1516580 1520519 1536535 1541540 1554124 1564472 1573390 1577114 1587355 1608373 1613612 1616216 1633240 1654730 1660120 1668238 1673672 1684540 1694420 1706705 1730729 1732094 1737736 1756040 1796564 1796977 1808230 1814120 1815905 1820203 1821820 1837990 1852994 1863862 1865332 1875965 1931644 1942655 1950520 1955590 1961960 1971554 1977976 1989053 1990820 1995532 2000719 2004002 2017015 2020270 2053688 2075320 2080232 2092090 2093740 2106020 2123212 2143960 2151149 2158156 2172170 2189902 2202746 2222297 2245705 2253020 2282852 2286536 2303114 2305160 2316622 2318680 2331665 2339260 2350699 2358356 2389387 2414555 2458456 2472470 2474420 2494415 2531522 2535676 2539768 2542267 2550548 2566520 2567110 2573186 2600290 2626351 2654015 2662660 2664760 2697695 2719717 2721862 2730728 2737826 2764580 2787148 2823172 2823821 2850760 2853565 2858170 2862860 2867480 2905448 2928926 2931236 2947945 3001544 3033160 3041038 3073070 3083080 3108248 3143987 3146780 3154228 3169595 3174710 3188185 3216746 3227224 3264331 3309460 3336476 3369080 3380377 3388840 3413410 3461458 3464188 3483935 3492181 3528965 3593128 3593954 3616460 3631810 3640406 3643640 3664045 3675980 3705988 3715621 3727724 3730664 3751930 3863288 3885310 3911180 3942785 3943108 3978106 3981640 3991064 3994991 4001438 4008004 4034030 4040540 4127123 4170595 4184180 4187480 4212040 4246424 4302298 4316312 4330235 4344340 4379804 4405492 4437433 4444594 4491410 4506040 4565704 4606228 4632485 4633244 4659655 4663330 4678520 4701398 4716712 4778774 4829110 4877509 4928885 4940551 4944940 4948840 4988830 5010005 5063044 5071352 5084534 5101096 5129663 5134220 5146372 5200580 5252702 5308030 5325320 5395390 5439434 5443724 5474755 5475652 5506865 5529160 5574296 5646344 5647642 5707130 5716340 5725720 5757785 5791555 5838833 5857852 5862472 5895890 6062329 6082076 6146140 6277843 6287974 6293560 6308456 6328805 6339190 6349420 6376370 6432965 6433492 6485479 6528662 6618920 6672952 6760754 6804655 6826820 6844565 6900439 6922916 6928376 6967870 6984362 7014007 7057930 7187908 7232920 7263620 7280812 7322315 7328090 7351960 7411976 7431242 7455448 7503860 7602595 7664657 7770620 7822360 7885570 7886216 7956212 7989982 8002876 8016008 8041865 8060899 8068060 8081080 8254246 8341190 8368360 8604596 8653645 8660470 8688680 8759608 8810984 8860327 8874866 8889188 8982820 8984885 9101015 9175309 9212456 9264970 9266488 9319310 9326660 9402796 9526517 9557548 9658220 9755018 9857770 9881102 9889880 9945265 9977660 10003595 10020010 10126088 10169068 10251241 10259326 10268440 10292744 10401160 10505404 10616060 10755745 10790780 10843547 10878868 10887448 10949510 10951304 11013730 11111485 11258611 11295284 11414260 11432680 11515570 11583110 11677666 11715704 11753495 11791780 11946935 12044461 12115103 12124658 12164152 12292280 12555686 12575948 12657610 12678380 12698840 12711335 12741421 12752740 12865930 12866984 12970958 13057324 13131755 13521508 13598585 13609310 13653640 13689130 13800878 13845832 13923371 13935740 13968724 14028014 14115860 14119105 14375816 14527240 14561624 14644630 14656180 14862484 14970241 15007720 15058043 15205190 15329314 15541240 15719935 15771140 15912424 15979964 16005752 16083730 16121798 16136120 16321655 16454893 16508492 16682380 16725709 16901885 17209192 17307290 17320940 17460905 17692103 17720654 17749732 17778376 17795869 17965640 17969770 18202030 18350618 18529940 18578105 18638620 18653320 18805592 19038019 19053034 19115096 19316440 19510036 19715540 19762204 19766747 19890530 19955320 19974955 20007190 20040020 20338136 20502482 20518652 20635615 21010808 21232120 21511490 21581560 21687094 21757736 21879583 21899020 22007909 22027460 22187165 22222970 22517222 22590568 22828520 23031140 23166220 23355332 23506990 23583560 23662639 23893870 24088922 24230206 24249316 24387545 24445267 24702755 25111372 25151896 25315220 25356760 25422670 25482842 25505480 25648315 25731860 25857689 25941916 26009347 26114648 26263510 27043016 27197170 27218620 27378260 27601756 27846742 27871480 27937448 27964937 28056028 28231720 28238210 28889861 29194165 29289260 29312360 29724968 29940482 30116086 30311645 30410380 30559087 30658628 31062031 31389215 31439870 31542280 31959928 32167460 32243596 32427395 32643310 32909786 33016984 33364760 33451418 33803770 34142563 34502195 34583857 34614580 34641880 34921810 35070035 35384206 35441308 35499464 35591738 35907641 35939540 36404060 36701236 37059880 37156210 37277240 38076038 38106068 38323285 39020072 39431080 39524408 39533494 39781060 39949910 40014380 40080040 40304495 40871831 41004964 41037304 41271230 42436303 43022980 43374188 43759166 43798040 43944901 44015818 44054920 44301635 44374330 44445940 45034444 45398353 45876545 46062280 46332440 46710664 47013980 47325278 47632585 47787740 48177844 48303073 48460412 48498632 48775090 48890534 49405510 50222744 50630440 50845340 50965684 51256205 51296630 51463720 51715378 51883832 52018694 52527020 53652599 54217735 54394340 54437240 54756520 55203512 55693484 55929874 56112056 56293055 56426293 56476420 57779722 58388330 58578520 59880964 60222305 60232172 60575515 60623290 60820760 61118174 61317256 62022289 62124062 62778430 62879740 63707105 64227163 64334920 64487192 64854790 65286620 65819572 66685619 66902836 67607540 68285126 69004390 69167714 69229160 69616855 69843620 70140070 70768412 70882616 71183476 71815282 71879080 72808120 73402472 74312420 74851205 75290215 75904829 76152076 76212136 76646570 78810277 79066988 79562120 79899820 80028760 80608990 81743662 82009928 82274465 82542460 83628545 84311227 84872606 86045960 86748376 87518332 87889802 88031636 88460515 88603270 88748660 88891880 88979345 90068888 90796706 91753090 94027960 94650556 95190095 95265170 95575480 96355688 96606146 96920824 97463597 97550180 97781068 98811020 98833735 101690680 101931368 102512410 102593260 103430756 104037388 104791687 105054040 107305198 108435470 108788680 109397915 110039545 111386968 111859748 112586110 112852586 112952840 115184251 115559444 116776660 118313195 119279017 119761928 120444610 120464344 121151030 121246580 122226335 122236348 123844721 124044578 124248124 125556860 125759480 127414210 128454326 129288445 129709580 130046735 130573240 131639144 133266133 133371238 133805672 135215080 136570252 138008780 138335428 139233710 139687240 139824685 140280140 141536824 142366952 143630564 144449305 148624840 149702410 150580430 151809658 152304152 152795435 153157081 153293140 155310155 157620554 158133976 159799640 161217980 163487324 164548930 165084920 165638473 167257090 168622454 169745212 170712815 172919285 175036664 175779604 176063272 176921030 177206540 177497320 177958690 179538205 181003823 181593412 183506180 189301112 190380190 190530340 193212292 194613133 194927194 195100360 195562136 195754559 197622040 197667470 204359155 205024820 205186520 206861512 208074776 209583374 212181515 213913609 214610396 216870940 217434217 218795830 219724505 220079090 223719496 225172220 225705172 226991765 230368502 231118888 233553320 236626390 238558034 240889220 241515365 242086999 242302060 242493160 244452670 244472696 247689442 248089156 248496248 251113720 254828420 256908652 258576890 259419160 260093470 266532266 266742476 268262995 273140504 276017560 276670856 278467420 279649370 280560280 282131465 284434579 286102817 287261128 288898610 299404820 301160860 303619316 305590870 306314162 306586280 307614307 310111445 310620310 315241108 317788471 321135815 322435960 326974648 329097860 331276946 333428095 334514180 336149957 337244908 338121511 339490424 341425630 345838570 351559208 353842060 354413080 355917380 359076410 362007646 363186824 367012360 375568193 379524145 380760380 381060680 386424584 389226266 389854388 391509118 394051385 394984051 395334940 408718310 410049640 419166748 421556135 424363030 427827218 429220792 433741880 434868434 437591660 439449010 440158180 449590141 450344440 451410344 453983530 460737004 466799333 473252780 477116068 481778440 483030730 484173998 484604120 487317985 488905340 495378884 496178312 509656840 513817304 517153780 520186940 523958435 531333803 533064532 533484952 536525990 551671939 556934840 559298740 564262930 568869158 572205634 575921255 577797220 590178589 596395085 598809640 602321720 607238632 611181740 612628324 615228614 619223605 620222890 621240620 630482216 635576942 642271630 658195720 662553892 666330665 666856190 669028360 672299914 674489816 676243022 682245179 682851260 691677140 707684120 711834760 718152820 724015292 733541809 751136386 759048290 761520760 765785405 778452532 779708776 783018236 788102770 789968102 790669880 806289757 817436620 828192365 834953119 838333496 843112270 848726060 855654436 866913047 869736868 875183320 878898020 880316360 899180282 905019115 907967060 921474008 933598666 946505560 954232136 966061460 968347996 973065665 974635970 977810680 978772795 990757768 1034307560 1040373880 1047916870 1062667606 1066129064 1069568045 1072099567 1073051980 1087171085 1103343878 1118597480 1128525860 1137738316 1144411268 1151842510 1155594440 1180357178 1192790170 1210434995 1222363480 1225256648 1230457228 1238447210 1240445780 1242481240 1267026761 1271153884 1284543260 1325107784 1332661330 1333712380 1344599828 1352486044 1362291931 1364490358 1365702520 1383354280 1422172895 1430514085 1436305640 1448030584 1467083618 1497395263 1502272772 1518096580 1531570810 1538071535 1556905064 1566036472 1576205540 1579936204 1588942355 1612579514 1634873240 1656384730 1669906238 1680749785 1686224540 1690607555 1697452120 1711308872 1733826094 1739473736 1757796040 1798360564 1810038230 1815934120 1867197332 1877840965 1932122920 1936695992 1946131330 1949271940 1957545590 1974920255 1991042053 2095833740 2125335212 2139136090 2144199134 2146103960 2153300149 2174342170 2206687756 2247950705 2257051720 2275476632 2288822536 2303685020 2333996665 2353049699 2360714356 2385580340 2420869990 2460914456 2476894420 2480891560 2534053522 2542307768 2569086520 2656669015 2665322660 2667424760 2689199656 2704972088 2724583862 2728980716 2758359695 2844345790 2861028170 2934167236 2950892945 2994790526 3004545544 3036193160 3063141620 3076143070 3147130987 3152411080 3159872408 3177884710 3225159028 3312769460 3339812476 3361499570 3372449080 3381215110 3411225895 3467652188 3596721128 3620076460 3667709045 3697649527 3719336621 3734394664 3755681930 3892262660 3898543880 3915091180 3949840510 3982084106 4031448785 4131250123 4174765595 4191667480 4250670424 4278272180 4288398268 4306600298 4334565235 4348684340 4413375512 4495901410 4607370040 4667993330 4706099398 4721428712 4771160680 4841739980 4953788840 5068107044 5134792663 5313338030 5330645320 5360497835 5449167724 5457961432 5516719390 5688691580 5722056340 5844671833 5868334472 5901785890 5989581052 6068391329 6126283240 6152286140 6294261974 6335133805 6355769420 6450318056 6625538920 6679624952 6722999140 6762430220 6811459655 6822451790 6935304376 7240152920 7335418090 7395299054 7438673242 7486976315 7504696969 7511363860 7784525320 7830182360 7899681020 7964168212 8062897570 8262500246 8349531190 8556544360 8576796536 8613200596 8669130470 8697368680 8869187327 8991802820 9335986660 9412198796 9536043517 9683479960 9955210265 10136214088 10269585326 10481766841 10626676060 10720995670 10766500745 10898335448 11033438780 11377383160 11444112680 11689343666 11765248495 11803571780 11979162104 12136782658 12304572280 12588523948 12670267610 12711538840 13445998280 13524860440 13622919310 13644903580 13937294371 14670836180 14790598108 14877346484 14973952630 15009393938 15022727720 15735654935 15799362040 15928336424 16125795140 16471347893 16525000492 16699062380 17226401192 17338260940 17738374654 17983605640 18488247635 18596683105 18671973320 18824397592 19072087034 19910420530 20539170652 20656250615 20963533682 21253352120 21441991340 21533001490 22066877560 23378687332 23530496990 23607143560 24273565316 25177047896 25340535220 25673963315 25883546689 27245838620 27289807160 27874588742 29223359165 29341672360 29581196216 29754692968 29947905260 30018787876 30341956645 31471309870 32251590280 32942695786 33050000984 33398124760 34676521880 35476749308 36976495270 37193366210 37523484845 38144174068 39820841060 40912702831 41078341304 41312501230 41927067364 42883982680 43066002980 44345936635 46757374664 47060993980 47680217585 48547130632 50681070440 51347926630 51767093378 52408834205 54491677240 55749177484 58446718330 59895810520 60037575752 60683913290 62942619740 65885391572 66752304619 69686471855 70953498616 73952990540 74386732420 75046969690 76288348136 79641682120 81825405662 82356739465 82625002460 83854134728 86132005960 88691873270 94121987960 95360435170 97561060597 102695853260 103534186756 104817668410 111498354968 115299435251 116893436660 121367826580 125885239480 129417733445 131770783144 133504609238 139372943710 147905981080 148773464840 150093939380 163650811324 164713478930 165250004920 177383746540 181184826823 190720870340 195122121194 204563514155 205391706520 207068373512 209635336820 230598870502 233786873320 242735653160 258835466890 267009218476 278745887420 300187878760 327301622648 329426957860 333761523095 354767493080 362369653646 381441740680 390244242388 409127028310 419270673640 461197741004 487805302985 517670933780 534018436952 557491774840 576497176255 658853915720 667523046190 724739307292 780488484776 818254056620 905924134115 922395482008 975610605970 1035341867560 1152994352510 1268293787761 1335046092380 1449478614584 1636508113240 1811848268230 1951221211940 2305988705020 2536587575522 2670092184760 3623696536460 3902442423880 4611977410040 5073175151044 6341468938805 7247393072920 10146350302088 12682937877610 25365875755220 50731751510440
- Sum of all divisors σ(n): 172717332480000
- Sum of proper divisors (its aliquot sum) s(n): 121985580969560
- 50731751510440 is an abundant number, because the sum of its proper divisors (121985580969560) is greater than itself. Its abundance is 71253829459120
Bases of 50731751510440
- Binary: 10111000100011111010000000011100010001101010002
- Hexadecimal: 0x2E23E80711A8
- Base-36: HZDUEZSMG
Squares and roots of 50731751510440
- 50731751510440 squared (507317515104402) is 2573710611317031221428993600
- 50731751510440 cubed (507317515104403) is 130568847193118254425426984162009093184000
-
The
square root of 50731751510440 is 7122622.5163516843 -
The
cube root of 50731751510440 is 37019.1650190717
Scales and comparisons
How big is 50731751510440?- 50,731,751,510,440 seconds is equal to 1,613,112 years, 40 weeks, 1 day, 21 hours, 20 minutes, 40 seconds.
-
To count from 1 to 50,731,751,510,440 would take you about four million, thirty-two thousand, seven hundred eighty-one 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 50731751510440 cubic inches would be around 3084.9 feet tall.
Recreational maths with 50731751510440
- 50731751510440 backwards is 04401515713705
- The number of decimal digits it has is: 14
- The sum of 50731751510440's digits is 43
- 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 50731751510440 - Facts about the integer". Numbermatics.com. 2024. Web. 27 May 2024.
APA style:
Numbermatics. (2024). Number 50731751510440 - Facts about the integer. Retrieved 27 May 2024, from https://numbermatics.com/n/50731751510440/
Chicago style:
Numbermatics. 2024. "Number 50731751510440 - Facts about the integer". https://numbermatics.com/n/50731751510440/
The information we have on file for 50731751510440 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 50731751510440, math, Factors of 50731751510440, curriculum, school, college, exams, university, Prime factorization of 50731751510440, STEM, science, technology, engineering, physics, economics, calculator, fifty trillion, seven hundred thirty-one billion, seven hundred fifty-one million, five hundred ten thousand, four hundred forty.