13129440

Names of 13129440

• Cardinal: 13129440 can be written as Thirteen million, one hundred twenty-nine thousand, four hundred forty.

Scientific notation

• Scientific notation: 1.312944 × 10⁷

Factors of 13129440

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 9
• Sum of prime factors: 1636

Divisors of 13129440

• Number of divisors d(n): 96
• Complete list of divisors:
  1 2 3 4 5 6 8 10 12 15 16 17 20 24 30 32 34 40 48 51 60 68 80 85 96 102 120 136 160 170 204 240 255 272 340 408 480 510 544 680 816 1020 1360 1609 1632 2040 2720 3218 4080 4827 6436 8045 8160 9654 12872 16090 19308 24135 25744 27353 32180 38616 48270 51488 54706 64360 77232 82059 96540 109412 128720 136765 154464 164118 193080 218824 257440 273530 328236 386160 410295 437648 547060 656472 772320 820590 875296 1094120 1312944 1641180 2188240 2625888 3282360 4376480 6564720 13129440
• Sum of all divisors σ(n): 43817760
• Sum of proper divisors (its aliquot sum) s(n): 30688320
• 13129440 is an abundant number, because the sum of its proper divisors (30688320) is greater than itself. Its abundance is 17558880

Bases of 13129440

• Binary: 110010000101011011100000₂
• Hexadecimal: 0xC856E0
• Base-36: 7TEQO

Squares and roots of 13129440

• 13129440 squared (13129440²) is 172382194713600
• 13129440 cubed (13129440³) is 2263281682560528384000
• The square root of 13129440 is 3623.4569129493
• The cube root of 13129440 is 235.9112948251

Scales and comparisons

• 13,129,440 seconds is equal to 21 weeks, 4 days, 23 hours, 4 minutes.
• To count from 1 to 13,129,440 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 13129440 cubic inches would be around 19.7 feet tall.

Recreational maths with 13129440

• 13129440 backwards is 04492131
• 13129440 is a Harshad number.
• The number of decimal digits it has is: 8
• The sum of 13129440's digits is 24
• More coming soon!