81284

Names of 81284

• Cardinal: 81284 can be written as Eighty-one thousand, two hundred eighty-four.

Scientific notation

• Scientific notation: 8.1284 × 10⁴

Factors of 81284

• Number of distinct prime factors ω(n): 3
• Total number of prime factors Ω(n): 4
• Sum of prime factors: 2912

Divisors of 81284

• Number of divisors d(n): 12
• Complete list of divisors:
  1 2 4 7 14 28 2903 5806 11612 20321 40642 81284
• Sum of all divisors σ(n): 162624
• Sum of proper divisors (its aliquot sum) s(n): 81340
• 81284 is an abundant number, because the sum of its proper divisors (81340) is greater than itself. Its abundance is 56

Bases of 81284

• Binary: 10011110110000100₂
• Hexadecimal: 0x13D84
• Base-36: 1QPW

Squares and roots of 81284

• 81284 squared (81284²) is 6607088656
• 81284 cubed (81284³) is 537050594314304
• The square root of 81284 is 285.1034899821
• The cube root of 81284 is 43.3179958871

Scales and comparisons

• 81,284 seconds is equal to 22 hours, 34 minutes, 44 seconds.
• To count from 1 to 81,284 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 81284 cubic inches would be around 3.6 feet tall.

Recreational maths with 81284

• 81284 backwards is 48218
• The number of decimal digits it has is: 5
• The sum of 81284's digits is 23
• More coming soon!