81489

Names of 81489

• Cardinal: 81489 can be written as Eighty-one thousand, four hundred eighty-nine.

Scientific notation

• Scientific notation: 8.1489 × 10⁴

Factors of 81489

• Number of distinct prime factors ω(n): 3
• Total number of prime factors Ω(n): 3
• Sum of prime factors: 1207

Divisors of 81489

• Number of divisors d(n): 8
• Complete list of divisors:
  1 3 23 69 1181 3543 27163 81489
• Sum of all divisors σ(n): 113472
• Sum of proper divisors (its aliquot sum) s(n): 31983
• 81489 is a deficient number, because the sum of its proper divisors (31983) is less than itself. Its deficiency is 49506

Bases of 81489

• Binary: 10011111001010001₂
• Hexadecimal: 0x13E51
• Base-36: 1QVL

Squares and roots of 81489

• 81489 squared (81489²) is 6640457121
• 81489 cubed (81489³) is 541124210333169
• The square root of 81489 is 285.4627821625
• The cube root of 81489 is 43.3543816221

Scales and comparisons

• 81,489 seconds is equal to 22 hours, 38 minutes, 9 seconds.
• To count from 1 to 81,489 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 81489 cubic inches would be around 3.6 feet tall.

Recreational maths with 81489

• 81489 backwards is 98418
• The number of decimal digits it has is: 5
• The sum of 81489's digits is 30
• More coming soon!