31390

Names of 31390

• Cardinal: 31390 can be written as Thirty-one thousand, three hundred ninety.

Scientific notation

• Scientific notation: 3.139 × 10⁴

Factors of 31390

• Number of distinct prime factors ω(n): 4
• Total number of prime factors Ω(n): 4
• Sum of prime factors: 123

Divisors of 31390

• Number of divisors d(n): 16
• Complete list of divisors:
  1 2 5 10 43 73 86 146 215 365 430 730 3139 6278 15695 31390
• Sum of all divisors σ(n): 58608
• Sum of proper divisors (its aliquot sum) s(n): 27218
• 31390 is a deficient number, because the sum of its proper divisors (27218) is less than itself. Its deficiency is 4172

Bases of 31390

• Binary: 111101010011110₂
• Hexadecimal: 0x7A9E
• Base-36: O7Y

Squares and roots of 31390

• 31390 squared (31390²) is 985332100
• 31390 cubed (31390³) is 30929574619000
• The square root of 31390 is 177.1722325873
• The cube root of 31390 is 31.5449932323

Scales and comparisons

• 31,390 seconds is equal to 8 hours, 43 minutes, 10 seconds.
• To count from 1 to 31,390 would take you about eight 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 31390 cubic inches would be around 2.6 feet tall.

Recreational maths with 31390

• 31390 backwards is 09313
• The number of decimal digits it has is: 5
• The sum of 31390's digits is 16
• More coming soon!