12945920

Names of 12945920

• Cardinal: 12945920 can be written as Twelve million, nine hundred forty-five thousand, nine hundred twenty.

Scientific notation

• Scientific notation: 1.294592 × 10⁷

Factors of 12945920

• Number of distinct prime factors ω(n): 4
• Total number of prime factors Ω(n): 12
• Sum of prime factors: 409

Divisors of 12945920

• Number of divisors d(n): 80
• Complete list of divisors:
  1 2 4 5 8 10 13 16 20 26 32 40 52 64 65 80 104 128 130 160 208 256 260 320 389 416 512 520 640 778 832 1040 1280 1556 1664 1945 2080 2560 3112 3328 3890 4160 5057 6224 6656 7780 8320 10114 12448 15560 16640 20228 24896 25285 31120 33280 40456 49792 50570 62240 80912 99584 101140 124480 161824 199168 202280 248960 323648 404560 497920 647296 809120 995840 1294592 1618240 2589184 3236480 6472960 12945920
• Sum of all divisors σ(n): 33513480
• Sum of proper divisors (its aliquot sum) s(n): 20567560
• 12945920 is an abundant number, because the sum of its proper divisors (20567560) is greater than itself. Its abundance is 7621640

Bases of 12945920

• Binary: 110001011000101000000000₂
• Hexadecimal: 0xC58A00
• Base-36: 7PH4W

Squares and roots of 12945920

• 12945920 squared (12945920²) is 167596844646400
• 12945920 cubed (12945920³) is 2169695343044722688000
• The square root of 12945920 is 3598.0439130171
• The cube root of 12945920 is 234.8069638559

Scales and comparisons

• 12,945,920 seconds is equal to 21 weeks, 2 days, 20 hours, 5 minutes, 20 seconds.
• To count from 1 to 12,945,920 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 12945920 cubic inches would be around 19.6 feet tall.

Recreational maths with 12945920

• 12945920 backwards is 02954921
• 12945920 is a Harshad number.
• The number of decimal digits it has is: 8
• The sum of 12945920's digits is 32
• More coming soon!