13181940

Names of 13181940

• Cardinal: 13181940 can be written as Thirteen million, one hundred eighty-one thousand, nine hundred forty.

Scientific notation

• Scientific notation: 1.318194 × 10⁷

Factors of 13181940

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 9
• Sum of prime factors: 192

Divisors of 13181940

• Number of divisors d(n): 120
• Complete list of divisors:
  1 2 3 4 5 6 9 10 12 15 18 20 27 30 36 45 54 60 79 81 90 103 108 135 158 162 180 206 237 270 309 316 324 395 405 412 474 515 540 618 711 790 810 927 948 1030 1185 1236 1422 1545 1580 1620 1854 2060 2133 2370 2781 2844 3090 3555 3708 4266 4635 4740 5562 6180 6399 7110 8137 8343 8532 9270 10665 11124 12798 13905 14220 16274 16686 18540 21330 24411 25596 27810 31995 32548 33372 40685 41715 42660 48822 55620 63990 73233 81370 83430 97644 122055 127980 146466 162740 166860 219699 244110 292932 366165 439398 488220 659097 732330 878796 1098495 1318194 1464660 2196990 2636388 3295485 4393980 6590970 13181940
• Sum of all divisors σ(n): 42282240
• Sum of proper divisors (its aliquot sum) s(n): 29100300
• 13181940 is an abundant number, because the sum of its proper divisors (29100300) is greater than itself. Its abundance is 15918360

Bases of 13181940

• Binary: 110010010010001111110100₂
• Hexadecimal: 0xC923F4
• Base-36: 7UJ90

Squares and roots of 13181940

• 13181940 squared (13181940²) is 173763542163600
• 13181940 cubed (13181940³) is 2290540586988045384000
• The square root of 13181940 is 3630.6941485065
• The cube root of 13181940 is 236.2253186613

Scales and comparisons

• 13,181,940 seconds is equal to 21 weeks, 5 days, 13 hours, 39 minutes.
• To count from 1 to 13,181,940 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 13181940 cubic inches would be around 19.7 feet tall.

Recreational maths with 13181940

• 13181940 backwards is 04918131
• 13181940 is a Harshad number.
• The number of decimal digits it has is: 8
• The sum of 13181940's digits is 27
• More coming soon!