31305990

Names of 31305990

• Cardinal: 31305990 can be written as Thirty-one million, three hundred five thousand, nine hundred ninety.

Scientific notation

• Scientific notation: 3.130599 × 10⁷

Factors of 31305990

• Number of distinct prime factors ω(n): 6
• Total number of prime factors Ω(n): 6
• Sum of prime factors: 861

Divisors of 31305990

• Number of divisors d(n): 64
• Complete list of divisors:
  1 2 3 5 6 10 15 23 30 46 59 69 115 118 138 177 230 295 345 354 590 690 769 885 1357 1538 1770 2307 2714 3845 4071 4614 6785 7690 8142 11535 13570 17687 20355 23070 35374 40710 45371 53061 88435 90742 106122 136113 176870 226855 265305 272226 453710 530610 680565 1043533 1361130 2087066 3130599 5217665 6261198 10435330 15652995 31305990
• Sum of all divisors σ(n): 79833600
• Sum of proper divisors (its aliquot sum) s(n): 48527610
• 31305990 is an abundant number, because the sum of its proper divisors (48527610) is greater than itself. Its abundance is 17221620

Bases of 31305990

• Binary: 1110111011011000100000110₂
• Hexadecimal: 0x1DDB106
• Base-36: IMZUU

Squares and roots of 31305990

• 31305990 squared (31305990²) is 980065009880100
• 31305990 cubed (31305990³) is 30681905398656311799000
• The square root of 31305990 is 5595.1756004615
• The cube root of 31305990 is 315.1682648505

Scales and comparisons

• 31,305,990 seconds is equal to 51 weeks, 5 days, 8 hours, 6 minutes, 30 seconds.
• To count from 1 to 31,305,990 would take you about twenty-five weeks!

  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 31305990 cubic inches would be around 26.3 feet tall.

Recreational maths with 31305990

• 31305990 backwards is 09950313
• 31305990 is a Harshad number.
• The number of decimal digits it has is: 8
• The sum of 31305990's digits is 30
• More coming soon!