12991206420

Names of 12991206420

• Cardinal: 12991206420 can be written as Twelve billion, nine hundred ninety-one million, two hundred six thousand, four hundred twenty.

Scientific notation

• Scientific notation: 1.299120642 × 10¹⁰

Factors of 12991206420

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 7
• Sum of prime factors: 662260

Divisors of 12991206420

• Number of divisors d(n): 72
• Complete list of divisors:
  1 2 3 4 5 6 9 10 12 15 18 20 30 36 45 60 90 109 180 218 327 436 545 654 981 1090 1308 1635 1962 2180 3270 3924 4905 6540 9810 19620 662141 1324282 1986423 2648564 3310705 3972846 5959269 6621410 7945692 9932115 11918538 13242820 19864230 23837076 29796345 39728460 59592690 72173369 119185380 144346738 216520107 288693476 360866845 433040214 649560321 721733690 866080428 1082600535 1299120642 1443467380 2165201070 2598241284 3247801605 4330402140 6495603210 12991206420
• Sum of all divisors σ(n): 39768248520
• Sum of proper divisors (its aliquot sum) s(n): 26777042100
• 12991206420 is an abundant number, because the sum of its proper divisors (26777042100) is greater than itself. Its abundance is 13785835680

Bases of 12991206420

• Binary: 1100000110010101100001010000010100₂
• Hexadecimal: 0x306561414
• Base-36: 5YUMN10

Squares and roots of 12991206420

• 12991206420 squared (12991206420²) is 168771444247049216400
• 12991206420 cubed (12991206420³) is 2192544670014937846151649288000
• The square root of 12991206420 is 113978.9735872367
• The cube root of 12991206420 is 2350.8043976301

Scales and comparisons

• 12,991,206,420 seconds is equal to 413 years, 4 weeks, 1 day, 4 hours, 27 minutes.
• To count from 1 to 12,991,206,420 would take you about eight hundred twenty-six 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 12991206420 cubic inches would be around 195.9 feet tall.

Recreational maths with 12991206420

• 12991206420 backwards is 02460219921
• 12991206420 is a Harshad number.
• The number of decimal digits it has is: 11
• The sum of 12991206420's digits is 36
• More coming soon!