12809940

Names of 12809940

• Cardinal: 12809940 can be written as Twelve million, eight hundred nine thousand, nine hundred forty.

Scientific notation

• Scientific notation: 1.280994 × 10⁷

Factors of 12809940

• Number of distinct prime factors ω(n): 6
• Total number of prime factors Ω(n): 7
• Sum of prime factors: 1527

Divisors of 12809940

• Number of divisors d(n): 96
• Complete list of divisors:
  1 2 3 4 5 6 10 11 12 13 15 20 22 26 30 33 39 44 52 55 60 65 66 78 110 130 132 143 156 165 195 220 260 286 330 390 429 572 660 715 780 858 1430 1493 1716 2145 2860 2986 4290 4479 5972 7465 8580 8958 14930 16423 17916 19409 22395 29860 32846 38818 44790 49269 58227 65692 77636 82115 89580 97045 98538 116454 164230 194090 197076 213499 232908 246345 291135 328460 388180 426998 492690 582270 640497 853996 985380 1067495 1164540 1280994 2134990 2561988 3202485 4269980 6404970 12809940
• Sum of all divisors σ(n): 42166656
• Sum of proper divisors (its aliquot sum) s(n): 29356716
• 12809940 is an abundant number, because the sum of its proper divisors (29356716) is greater than itself. Its abundance is 16546776

Bases of 12809940

• Binary: 110000110111011011010100₂
• Hexadecimal: 0xC376D4
• Base-36: 7MK7O

Squares and roots of 12809940

• 12809940 squared (12809940²) is 164094562803600
• 12809940 cubed (12809940³) is 2102041503840347784000
• The square root of 12809940 is 3579.0976516435
• The cube root of 12809940 is 233.9819549237

Scales and comparisons

• 12,809,940 seconds is equal to 21 weeks, 1 day, 6 hours, 19 minutes.
• To count from 1 to 12,809,940 would take you about thirty-one 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 12809940 cubic inches would be around 19.5 feet tall.

Recreational maths with 12809940

• 12809940 backwards is 04990821
• 12809940 is a Harshad number.
• The number of decimal digits it has is: 8
• The sum of 12809940's digits is 33
• More coming soon!