81966

Names of 81966

• Cardinal: 81966 can be written as Eighty-one thousand, nine hundred sixty-six.

Scientific notation

• Scientific notation: 8.1966 × 10⁴

Factors of 81966

• Number of distinct prime factors ω(n): 4
• Total number of prime factors Ω(n): 4
• Sum of prime factors: 743

Divisors of 81966

• Number of divisors d(n): 16
• Complete list of divisors:
  1 2 3 6 19 38 57 114 719 1438 2157 4314 13661 27322 40983 81966
• Sum of all divisors σ(n): 172800
• Sum of proper divisors (its aliquot sum) s(n): 90834
• 81966 is an abundant number, because the sum of its proper divisors (90834) is greater than itself. Its abundance is 8868

Bases of 81966

• Binary: 10100000000101110₂
• Hexadecimal: 0x1402E
• Base-36: 1R8U

Squares and roots of 81966

• 81966 squared (81966²) is 6718425156
• 81966 cubed (81966³) is 550682436336696
• The square root of 81966 is 286.2970485353
• The cube root of 81966 is 43.4388094597

Scales and comparisons

• 81,966 seconds is equal to 22 hours, 46 minutes, 6 seconds.
• To count from 1 to 81,966 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 81966 cubic inches would be around 3.6 feet tall.

Recreational maths with 81966

• 81966 backwards is 66918
• The number of decimal digits it has is: 5
• The sum of 81966's digits is 30
• More coming soon!