81307340928

Names of 81307340928

• Cardinal: 81307340928 can be written as Eighty-one billion, three hundred seven million, three hundred forty thousand, nine hundred twenty-eight.

Scientific notation

• Scientific notation: 8.1307340928 × 10¹⁰

Factors of 81307340928

• Number of distinct prime factors ω(n): 6
• Total number of prime factors Ω(n): 13
• Sum of prime factors: 921

Divisors of 81307340928

• Number of divisors d(n): 384
• Complete list of divisors:
  1 2 3 4 6 8 9 11 12 16 18 22 24 32 33 36 44 47 48 64 66 72 88 94 96 99 128 132 141 144 176 188 192 198 211 264 282 288 352 376 384 396 422 423 517 528 564 576 633 647 704 752 792 844 846 1034 1056 1128 1152 1266 1294 1408 1504 1551 1584 1688 1692 1899 1941 2068 2112 2256 2321 2532 2588 3008 3102 3168 3376 3384 3798 3882 4136 4224 4512 4642 4653 5064 5176 5823 6016 6204 6336 6752 6768 6963 7117 7596 7764 8272 9024 9284 9306 9917 10128 10352 11646 12408 12672 13504 13536 13926 14234 15192 15528 16544 18048 18568 18612 19834 20256 20704 20889 21351 23292 24816 27008 27072 27852 28468 29751 30384 30409 31056 33088 37136 37224 39668 40512 41408 41778 42702 46584 49632 54144 55704 56936 59502 60768 60818 62112 64053 66176 74272 74448 79336 81024 82816 83556 85404 89253 91227 93168 99264 109087 111408 113872 119004 121536 121636 124224 128106 136517 148544 148896 158672 167112 170808 178506 182454 186336 198528 218174 222816 227744 238008 243072 243272 248448 256212 273034 273681 297088 297792 317344 327261 334224 334499 341616 357012 364908 372672 409551 436348 445632 455488 476016 486544 512424 546068 547362 595584 634688 654522 668448 668998 683232 714024 729816 745344 819102 872696 891264 910976 952032 973088 981783 1003497 1024848 1092136 1094724 1228653 1269376 1309044 1336896 1337996 1366464 1428048 1459632 1501687 1638204 1745392 1904064 1946176 1963566 2006994 2049696 2184272 2189448 2457306 2618088 2673792 2675992 2732928 2856096 2919264 3003374 3010491 3276408 3490784 3808128 3892352 3927132 4013988 4099392 4368544 4378896 4505061 4914612 5236176 5351984 5712192 5838528 6006748 6020982 6416299 6552816 6981568 7854264 8027976 8198784 8737088 8757792 9010122 9829224 10472352 10703968 11424384 11677056 12013496 12041964 12832598 13105632 13515183 13963136 15708528 16055952 17474176 17515584 18020244 19248897 19658448 20944704 21407936 24026992 24083928 25665196 26211264 27030366 31417056 32111904 35031168 36040488 38497794 39316896 41889408 42815872 48053984 48167856 51330392 52422528 54060732 57746691 62834112 64223808 70579289 72080976 76995588 78633792 96107968 96335712 102660784 108121464 115493382 125668224 128447616 141158578 144161952 153991176 157267584 192215936 192671424 205321568 211737867 216242928 230986764 282317156 288323904 307982352 385342848 410643136 423475734 432485856 461973528 564634312 576647808 615964704 635213601 821286272 846951468 864971712 923947056 1129268624 1231929408 1270427202 1693902936 1729943424 1847894112 2258537248 2463858816 2540854404 3387805872 3695788224 4517074496 5081708808 6775611744 7391576448 9034148992 10163417616 13551223488 20326835232 27102446976 40653670464 81307340928
• Sum of all divisors σ(n): 262311229440
• Sum of proper divisors (its aliquot sum) s(n): 181003888512
• 81307340928 is an abundant number, because the sum of its proper divisors (181003888512) is greater than itself. Its abundance is 99696547584

Bases of 81307340928

• Binary: 1001011101110010010111001000010000000₂
• Hexadecimal: 0x12EE4B9080
• Base-36: 11COAHS0

Squares and roots of 81307340928

• 81307340928 squared (81307340928²) is 6610883688782023901184
• 81307340928 cubed (81307340928³) is 537513373919154266411412070858752
• The square root of 81307340928 is 285144.4211763575
• The cube root of 81307340928 is 4332.2141784771

Scales and comparisons

• 81,307,340,928 seconds is equal to 2,585 years, 16 weeks, 5 days, 4 hours, 28 minutes, 48 seconds.
• To count from 1 to 81,307,340,928 would take you about five thousand, one hundred seventy 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 81307340928 cubic inches would be around 361 feet tall.

Recreational maths with 81307340928

• 81307340928 backwards is 82904370318
• The number of decimal digits it has is: 11
• The sum of 81307340928's digits is 45
• More coming soon!