81143040

Names of 81143040

• Cardinal: 81143040 can be written as Eighty-one million, one hundred forty-three thousand and forty.

Scientific notation

• Scientific notation: 8.114304 × 10⁷

Factors of 81143040

• Number of distinct prime factors ω(n): 6
• Total number of prime factors Ω(n): 13
• Sum of prime factors: 151

Divisors of 81143040

• Number of divisors d(n): 288
• Complete list of divisors:
  1 2 3 4 5 6 8 10 11 12 15 16 17 20 22 24 30 32 33 34 40 44 48 51 55 60 64 66 68 80 85 88 96 102 110 113 120 128 132 136 160 165 170 176 187 192 204 220 226 240 255 256 264 272 320 330 339 340 352 374 384 408 440 452 480 510 528 544 561 565 640 660 678 680 704 748 768 816 880 904 935 960 1020 1056 1088 1122 1130 1243 1280 1320 1356 1360 1408 1496 1632 1695 1760 1808 1870 1920 1921 2040 2112 2176 2244 2260 2486 2640 2712 2720 2805 2816 2992 3264 3390 3520 3616 3729 3740 3840 3842 4080 4224 4352 4488 4520 4972 5280 5424 5440 5610 5763 5984 6215 6528 6780 7040 7232 7458 7480 7684 8160 8448 8976 9040 9605 9944 10560 10848 10880 11220 11526 11968 12430 13056 13560 14080 14464 14916 14960 15368 16320 17952 18080 18645 19210 19888 21120 21131 21696 21760 22440 23052 23936 24860 27120 28815 28928 29832 29920 30736 32640 35904 36160 37290 38420 39776 42240 42262 43392 44880 46104 47872 49720 54240 57630 59664 59840 61472 63393 65280 71808 72320 74580 76840 79552 84524 86784 89760 92208 99440 105655 108480 115260 119328 119680 122944 126786 143616 144640 149160 153680 159104 169048 179520 184416 198880 211310 216960 230520 238656 239360 245888 253572 298320 307360 316965 318208 338096 359040 368832 397760 422620 433920 461040 477312 491776 507144 596640 614720 633930 676192 718080 737664 795520 845240 922080 954624 1014288 1193280 1229440 1267860 1352384 1475328 1591040 1690480 1844160 2028576 2386560 2458880 2535720 2704768 3380960 3688320 4057152 4773120 5071440 5409536 6761920 7376640 8114304 10142880 13523840 16228608 20285760 27047680 40571520 81143040
• Sum of all divisors σ(n): 301988736
• Sum of proper divisors (its aliquot sum) s(n): 220845696
• 81143040 is an abundant number, because the sum of its proper divisors (220845696) is greater than itself. Its abundance is 139702656

Bases of 81143040

• Binary: 100110101100010010100000000₂
• Hexadecimal: 0x4D62500
• Base-36: 1CB6DC

Squares and roots of 81143040

• 81143040 squared (81143040²) is 6584192940441600
• 81143040 cubed (81143040³) is 534261431133970366464000
• The square root of 81143040 is 9007.9431614547
• The cube root of 81143040 is 432.9294119083

Scales and comparisons

• 81,143,040 seconds is equal to 2 years, 30 weeks, 1 day, 3 hours, 44 minutes.
• To count from 1 to 81,143,040 would take you about three 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 81143040 cubic inches would be around 36.1 feet tall.

Recreational maths with 81143040

• 81143040 backwards is 04034118
• The number of decimal digits it has is: 8
• The sum of 81143040's digits is 21
• More coming soon!