81628

Names of 81628

• Cardinal: 81628 can be written as Eighty-one thousand, six hundred twenty-eight.

Scientific notation

• Scientific notation: 8.1628 × 10⁴

Factors of 81628

• Number of distinct prime factors ω(n): 2
• Total number of prime factors Ω(n): 3
• Sum of prime factors: 20409

Divisors of 81628

• Number of divisors d(n): 6
• Complete list of divisors:
  1 2 4 20407 40814 81628
• Sum of all divisors σ(n): 142856
• Sum of proper divisors (its aliquot sum) s(n): 61228
• 81628 is a deficient number, because the sum of its proper divisors (61228) is less than itself. Its deficiency is 20400

Bases of 81628

• Binary: 10011111011011100₂
• Hexadecimal: 0x13EDC
• Base-36: 1QZG

Squares and roots of 81628

• 81628 squared (81628²) is 6663130384
• 81628 cubed (81628³) is 543898006985152
• The square root of 81628 is 285.7061427411
• The cube root of 81628 is 43.3790182227

Scales and comparisons

• 81,628 seconds is equal to 22 hours, 40 minutes, 28 seconds.
• To count from 1 to 81,628 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 81628 cubic inches would be around 3.6 feet tall.

Recreational maths with 81628

• 81628 backwards is 82618
• The number of decimal digits it has is: 5
• The sum of 81628's digits is 25
• More coming soon!