12987940

Names of 12987940

• Cardinal: 12987940 can be written as Twelve million, nine hundred eighty-seven thousand, nine hundred forty.

Scientific notation

• Scientific notation: 1.298794 × 10⁷

Factors of 12987940

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 7
• Sum of prime factors: 500

Divisors of 12987940

• Number of divisors d(n): 72
• Complete list of divisors:
  1 2 4 5 7 10 14 20 28 29 35 49 58 70 98 116 140 145 196 203 245 290 406 457 490 580 812 914 980 1015 1421 1828 2030 2285 2842 3199 4060 4570 5684 6398 7105 9140 12796 13253 14210 15995 22393 26506 28420 31990 44786 53012 63980 66265 89572 92771 111965 132530 185542 223930 265060 371084 447860 463855 649397 927710 1298794 1855420 2597588 3246985 6493970 12987940
• Sum of all divisors σ(n): 32893560
• Sum of proper divisors (its aliquot sum) s(n): 19905620
• 12987940 is an abundant number, because the sum of its proper divisors (19905620) is greater than itself. Its abundance is 6917680

Bases of 12987940

• Binary: 110001100010111000100100₂
• Hexadecimal: 0xC62E24
• Base-36: 7QDK4

Squares and roots of 12987940

• 12987940 squared (12987940²) is 168686585443600
• 12987940 cubed (12987940³) is 2190891250546350184000
• The square root of 12987940 is 3603.8784663195
• The cube root of 12987940 is 235.0607357727

Scales and comparisons

• 12,987,940 seconds is equal to 21 weeks, 3 days, 7 hours, 45 minutes, 40 seconds.
• To count from 1 to 12,987,940 would take you about thirty-two 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 12987940 cubic inches would be around 19.6 feet tall.

Recreational maths with 12987940

• 12987940 backwards is 04978921
• The number of decimal digits it has is: 8
• The sum of 12987940's digits is 40
• More coming soon!