81984

Names of 81984

• Cardinal: 81984 can be written as Eighty-one thousand, nine hundred eighty-four.

Scientific notation

• Scientific notation: 8.1984 × 10⁴

Factors of 81984

• Number of distinct prime factors ω(n): 4
• Total number of prime factors Ω(n): 9
• Sum of prime factors: 73

Divisors of 81984

• Number of divisors d(n): 56
• Complete list of divisors:
  1 2 3 4 6 7 8 12 14 16 21 24 28 32 42 48 56 61 64 84 96 112 122 168 183 192 224 244 336 366 427 448 488 672 732 854 976 1281 1344 1464 1708 1952 2562 2928 3416 3904 5124 5856 6832 10248 11712 13664 20496 27328 40992 81984
• Sum of all divisors σ(n): 251968
• Sum of proper divisors (its aliquot sum) s(n): 169984
• 81984 is an abundant number, because the sum of its proper divisors (169984) is greater than itself. Its abundance is 88000

Bases of 81984

• Binary: 10100000001000000₂
• Hexadecimal: 0x14040
• Base-36: 1R9C

Squares and roots of 81984

• 81984 squared (81984²) is 6721376256
• 81984 cubed (81984³) is 551045310971904
• The square root of 81984 is 286.3284826907
• The cube root of 81984 is 43.4419889949

Scales and comparisons

• 81,984 seconds is equal to 22 hours, 46 minutes, 24 seconds.
• To count from 1 to 81,984 would take you about twenty-two hours.

  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 81984 cubic inches would be around 3.6 feet tall.

Recreational maths with 81984

• 81984 backwards is 48918
• The number of decimal digits it has is: 5
• The sum of 81984's digits is 30
• More coming soon!