81996816

Names of 81996816

• Cardinal: 81996816 can be written as Eighty-one million, nine hundred ninety-six thousand, eight hundred sixteen.

Scientific notation

• Scientific notation: 8.1996816 × 10⁷

Factors of 81996816

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 8
• Sum of prime factors: 1714

Divisors of 81996816

• Number of divisors d(n): 80
• Complete list of divisors:
  1 2 3 4 6 8 11 12 16 22 24 33 44 48 66 88 97 132 176 194 264 291 388 528 582 776 1067 1164 1552 1601 2134 2328 3201 3202 4268 4656 4803 6402 6404 8536 9606 12804 12808 17072 17611 19212 25608 25616 35222 38424 51216 52833 70444 76848 105666 140888 155297 211332 281776 310594 422664 465891 621188 845328 931782 1242376 1708267 1863564 2484752 3416534 3727128 5124801 6833068 7454256 10249602 13666136 20499204 27332272 40998408 81996816
• Sum of all divisors σ(n): 233610048
• Sum of proper divisors (its aliquot sum) s(n): 151613232
• 81996816 is an abundant number, because the sum of its proper divisors (151613232) is greater than itself. Its abundance is 69616416

Bases of 81996816

• Binary: 100111000110010110000010000₂
• Hexadecimal: 0x4E32C10
• Base-36: 1CTH5C

Squares and roots of 81996816

• 81996816 squared (81996816²) is 6723477834137856
• 81996816 cubed (81996816³) is 551303774845880297066496
• The square root of 81996816 is 9055.2093294415
• The cube root of 81996816 is 434.4425254029

Scales and comparisons

• 81,996,816 seconds is equal to 2 years, 31 weeks, 4 days, 53 minutes, 36 seconds.
• To count from 1 to 81,996,816 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 81996816 cubic inches would be around 36.2 feet tall.

Recreational maths with 81996816

• 81996816 backwards is 61869918
• 81996816 is a Harshad number.
• The number of decimal digits it has is: 8
• The sum of 81996816's digits is 48
• More coming soon!