31980

Names of 31980

• Cardinal: 31980 can be written as Thirty-one thousand, nine hundred eighty.

Scientific notation

• Scientific notation: 3.198 × 10⁴

Factors of 31980

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 6
• Sum of prime factors: 64

Divisors of 31980

• Number of divisors d(n): 48
• Complete list of divisors:
  1 2 3 4 5 6 10 12 13 15 20 26 30 39 41 52 60 65 78 82 123 130 156 164 195 205 246 260 390 410 492 533 615 780 820 1066 1230 1599 2132 2460 2665 3198 5330 6396 7995 10660 15990 31980
• Sum of all divisors σ(n): 98784
• Sum of proper divisors (its aliquot sum) s(n): 66804
• 31980 is an abundant number, because the sum of its proper divisors (66804) is greater than itself. Its abundance is 34824

Bases of 31980

• Binary: 111110011101100₂
• Hexadecimal: 0x7CEC
• Base-36: OOC

Squares and roots of 31980

• 31980 squared (31980²) is 1022720400
• 31980 cubed (31980³) is 32706598392000
• The square root of 31980 is 178.8295277633
• The cube root of 31980 is 31.7414054899

Scales and comparisons

• 31,980 seconds is equal to 8 hours, 53 minutes.
• To count from 1 to 31,980 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 31980 cubic inches would be around 2.6 feet tall.

Recreational maths with 31980

• 31980 backwards is 08913
• The number of decimal digits it has is: 5
• The sum of 31980's digits is 21
• More coming soon!