81490

Names of 81490

• Cardinal: 81490 can be written as Eighty-one thousand, four hundred ninety.

Scientific notation

• Scientific notation: 8.149 × 10⁴

Factors of 81490

• Number of distinct prime factors ω(n): 4
• Total number of prime factors Ω(n): 4
• Sum of prime factors: 317

Divisors of 81490

• Number of divisors d(n): 16
• Complete list of divisors:
  1 2 5 10 29 58 145 281 290 562 1405 2810 8149 16298 40745 81490
• Sum of all divisors σ(n): 152280
• Sum of proper divisors (its aliquot sum) s(n): 70790
• 81490 is a deficient number, because the sum of its proper divisors (70790) is less than itself. Its deficiency is 10700

Bases of 81490

• Binary: 10011111001010010₂
• Hexadecimal: 0x13E52
• Base-36: 1QVM

Squares and roots of 81490

• 81490 squared (81490²) is 6640620100
• 81490 cubed (81490³) is 541144131949000
• The square root of 81490 is 285.4645336991
• The cube root of 81490 is 43.3545589637

Scales and comparisons

• 81,490 seconds is equal to 22 hours, 38 minutes, 10 seconds.
• To count from 1 to 81,490 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 81490 cubic inches would be around 3.6 feet tall.

Recreational maths with 81490

• 81490 backwards is 09418
• The number of decimal digits it has is: 5
• The sum of 81490's digits is 22
• More coming soon!