81470388240

Names of 81470388240

• Cardinal: 81470388240 can be written as Eighty-one billion, four hundred seventy million, three hundred eighty-eight thousand, two hundred forty.

Scientific notation

• Scientific notation: 8.147038824 × 10¹⁰

Factors of 81470388240

• Number of distinct prime factors ω(n): 7
• Total number of prime factors Ω(n): 11
• Sum of prime factors: 910

Divisors of 81470388240

• Number of divisors d(n): 480
• Complete list of divisors:
  1 2 3 4 5 6 8 9 10 12 15 16 18 20 24 30 31 36 40 41 45 48 60 62 72 80 82 90 93 120 123 124 127 144 155 164 180 186 205 240 246 248 254 279 310 328 360 369 372 381 410 465 492 496 508 558 615 620 635 656 701 720 738 744 762 820 930 984 1016 1116 1143 1230 1240 1270 1271 1395 1402 1476 1488 1524 1640 1845 1860 1905 1968 2032 2103 2232 2286 2460 2480 2540 2542 2790 2804 2952 3048 3280 3505 3690 3720 3810 3813 3937 4206 4464 4572 4920 5080 5084 5207 5580 5608 5715 5904 6096 6309 6355 7010 7380 7440 7620 7626 7874 8412 9144 9840 10160 10168 10414 10515 11160 11216 11430 11439 11811 12618 12710 14020 14760 15240 15252 15621 15748 16824 18288 19065 19685 20336 20828 21030 21731 22320 22860 22878 23622 25236 25420 26035 28040 28741 29520 30480 30504 31242 31496 31545 33648 35433 38130 39370 41656 42060 43462 45720 45756 46863 47244 50472 50840 52070 56080 57195 57482 59055 61008 62484 62992 63090 65193 70866 76260 78105 78740 83312 84120 86223 86924 89027 91440 91512 93726 94488 100944 101680 104140 108655 114390 114964 118110 124968 126180 130386 141732 143705 152520 156210 157480 161417 168240 172446 173848 177165 178054 183024 187452 188976 195579 208280 217310 228780 229928 234315 236220 249936 252360 258669 260772 267081 283464 287410 305040 312420 314960 322834 325965 344892 347696 354330 356108 374904 391158 416560 431115 434620 445135 457560 459856 468630 472440 484251 504720 517338 521544 534162 566928 574820 624840 645668 651930 689784 708660 712216 749808 782316 801243 807085 862230 869240 890270 890971 915120 937260 944880 968502 977895 1034676 1043088 1068324 1149640 1249680 1291336 1293345 1303860 1335405 1379568 1417320 1424432 1452753 1564632 1602486 1614170 1724460 1738480 1780540 1781942 1874520 1937004 1955790 2069352 2136648 2299280 2421255 2582672 2586690 2607720 2670810 2672913 2759837 2834640 2905506 3129264 3204972 3228340 3448920 3561080 3563884 3650107 3749040 3874008 3911580 4006215 4138704 4273296 4454855 4842510 5173380 5215440 5341620 5345826 5519674 5811012 6409944 6456680 6897840 7122160 7127768 7263765 7300214 7748016 7823160 8012430 8018739 8279511 8909710 9685020 10346760 10683240 10691652 10950321 11039348 11622024 12819888 12913360 13364565 13799185 14255536 14527530 14600428 15646320 16024860 16037478 16559022 17819420 18250535 19370040 20693520 21366480 21383304 21900642 22078696 23244048 24838533 26729130 27598370 29055060 29200856 32049720 32074956 32850963 33118044 35638840 36501070 38740080 40093695 41397555 42766608 43801284 44157392 49677066 53458260 54751605 55196740 58110120 58401712 64099440 64149912 65701926 66236088 71277680 73002140 80187390 82795110 87602568 99354132 106916520 109503210 110393480 113153317 116220240 124192665 128299824 131403852 132472176 146004280 160374780 164254815 165590220 175205136 198708264 213833040 219006420 220786960 226306634 248385330 262807704 292008560 320749560 328509630 331180440 339459951 397416528 438012840 452613268 496770660 525615408 565766585 641499120 657019260 662360880 678919902 876025680 905226536 993541320 1018379853 1131533170 1314038520 1357839804 1697299755 1810453072 1987082640 2036759706 2263066340 2628077040 2715679608 3394599510 4073519412 4526132680 5091899265 5431359216 6789199020 8147038824 9052265360 10183798530 13578398040 16294077648 20367597060 27156796080 40735194120 81470388240
• Sum of all divisors σ(n): 292013309952
• Sum of proper divisors (its aliquot sum) s(n): 210542921712
• 81470388240 is an abundant number, because the sum of its proper divisors (210542921712) is greater than itself. Its abundance is 129072533472

Bases of 81470388240

• Binary: 1001011111000000000110111100000010000₂
• Hexadecimal: 0x12F8037810
• Base-36: 11FDD5W0

Squares and roots of 81470388240

• 81470388240 squared (81470388240²) is 6637424159976330297600
• 81470388240 cubed (81470388240³) is 540753523226827498555946740224000
• The square root of 81470388240 is 285430.1810250625
• The cube root of 81470388240 is 4335.1080715227

Scales and comparisons

• 81,470,388,240 seconds is equal to 2,590 years, 26 weeks, 2 days, 7 hours, 24 minutes.
• To count from 1 to 81,470,388,240 would take you about five thousand, one 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 81470388240 cubic inches would be around 361.3 feet tall.

Recreational maths with 81470388240

• 81470388240 backwards is 04288307418
• 81470388240 is a Harshad number.
• The number of decimal digits it has is: 11
• The sum of 81470388240's digits is 45
• More coming soon!