81428267830

Names of 81428267830

• Cardinal: 81428267830 can be written as Eighty-one billion, four hundred twenty-eight million, two hundred sixty-seven thousand, eight hundred thirty.

Scientific notation

• Scientific notation: 8.142826783 × 10¹⁰

Factors of 81428267830

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 10
• Sum of prime factors: 268

Divisors of 81428267830

• Number of divisors d(n): 112
• Complete list of divisors:
  1 2 5 7 10 13 14 26 35 65 70 91 130 169 182 241 338 455 482 845 910 1183 1205 1687 1690 2197 2366 2410 3133 3374 4394 5915 6266 8435 10985 11830 15379 15665 16870 21931 21970 28561 30758 31330 40729 43862 57122 76895 81458 109655 142805 153790 199927 203645 219310 285103 285610 371293 399854 407290 529477 570206 742586 999635 1058954 1425515 1856465 1999270 2599051 2647385 2851030 3706339 3712930 4826809 5198102 5294770 6883201 7412678 9653618 12995255 13766402 18531695 24134045 25990510 33787663 34416005 37063390 48182407 48268090 67575326 68832010 89481613 96364814 168938315 178963226 240912035 337876630 447408065 481824070 626371291 894816130 1163260969 1252742582 2326521938 3131856455 5816304845 6263712910 8142826783 11632609690 16285653566 40714133915 81428267830
• Sum of all divisors σ(n): 182221690464
• Sum of proper divisors (its aliquot sum) s(n): 100793422634
• 81428267830 is an abundant number, because the sum of its proper divisors (100793422634) is greater than itself. Its abundance is 19365154804

Bases of 81428267830

• Binary: 1001011110101100000001100001100110110₂
• Hexadecimal: 0x12F580C336
• Base-36: 11EOADKM

Squares and roots of 81428267830

• 81428267830 squared (81428267830²) is 6630562801794212908900
• 81428267830 cubed (81428267830³) is 539915243688134373289952590687000
• The square root of 81428267830 is 285356.3874000371
• The cube root of 81428267830 is 4334.3608552231

Scales and comparisons

• 81,428,267,830 seconds is equal to 2,589 years, 8 weeks, 4 days, 19 hours, 17 minutes, 10 seconds.
• To count from 1 to 81,428,267,830 would take you about five thousand, one hundred seventy-eight 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 81428267830 cubic inches would be around 361.2 feet tall.

Recreational maths with 81428267830

• 81428267830 backwards is 03876282418
• The number of decimal digits it has is: 11
• The sum of 81428267830's digits is 49
• More coming soon!