12891978720

Names of 12891978720

• Cardinal: 12891978720 can be written as Twelve billion, eight hundred ninety-one million, nine hundred seventy-eight thousand, seven hundred twenty.

Scientific notation

• Scientific notation: 1.289197872 × 10¹⁰

Factors of 12891978720

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 10
• Sum of prime factors: 9294

Divisors of 12891978720

• Number of divisors d(n): 144
• Complete list of divisors:
  1 2 3 4 5 6 8 9 10 12 15 16 18 20 24 30 32 36 40 45 48 60 72 80 90 96 120 144 160 180 240 288 360 480 720 1093 1440 2186 3279 4372 5465 6558 8191 8744 9837 10930 13116 16382 16395 17488 19674 21860 24573 26232 32764 32790 34976 39348 40955 43720 49146 49185 52464 65528 65580 73719 78696 81910 87440 98292 98370 104928 122865 131056 131160 147438 157392 163820 174880 196584 196740 245730 262112 262320 294876 314784 327640 368595 393168 393480 491460 524640 589752 655280 737190 786336 786960 982920 1179504 1310560 1474380 1573920 1965840 2359008 2948760 3931680 5897520 8952763 11795040 17905526 26858289 35811052 44763815 53716578 71622104 80574867 89527630 107433156 134291445 143244208 161149734 179055260 214866312 268582890 286488416 322299468 358110520 402874335 429732624 537165780 644598936 716221040 805748670 859465248 1074331560 1289197872 1432442080 1611497340 2148663120 2578395744 3222994680 4297326240 6445989360 12891978720
• Sum of all divisors σ(n): 44039503872
• Sum of proper divisors (its aliquot sum) s(n): 31147525152
• 12891978720 is an abundant number, because the sum of its proper divisors (31147525152) is greater than itself. Its abundance is 18255546432

Bases of 12891978720

• Binary: 1100000000011010111111101111100000₂
• Hexadecimal: 0x3006BFBE0
• Base-36: 5X7JUG0

Squares and roots of 12891978720

• 12891978720 squared (12891978720²) is 166203115316932838400
• 12891978720 cubed (12891978720³) is 2142687025863604208321998848000
• The square root of 12891978720 is 113542.8497088213
• The cube root of 12891978720 is 2344.8038939909

Scales and comparisons

• 12,891,978,720 seconds is equal to 409 years, 48 weeks, 17 hours, 12 minutes.
• To count from 1 to 12,891,978,720 would take you about eight hundred nineteen years!

  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 12891978720 cubic inches would be around 195.4 feet tall.

Recreational maths with 12891978720

• 12891978720 backwards is 02787919821
• The number of decimal digits it has is: 11
• The sum of 12891978720's digits is 54
• More coming soon!