129491180

Names of 129491180

• Cardinal: 129491180 can be written as One hundred twenty-nine million, four hundred ninety-one thousand, one hundred eighty.

Scientific notation

• Scientific notation: 1.2949118 × 10⁸

Factors of 129491180

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 8
• Sum of prime factors: 448

Divisors of 129491180

• Number of divisors d(n): 96
• Complete list of divisors:
  1 2 4 5 7 10 13 14 20 26 28 35 52 65 70 91 130 140 169 182 260 338 364 421 455 676 842 845 910 1183 1684 1690 1820 2105 2197 2366 2947 3380 4210 4394 4732 5473 5894 5915 8420 8788 10946 10985 11788 11830 14735 15379 21892 21970 23660 27365 29470 30758 38311 43940 54730 58940 61516 71149 76622 76895 109460 142298 153244 153790 191555 284596 307580 355745 383110 498043 711490 766220 924937 996086 1422980 1849874 1992172 2490215 3699748 4624685 4980430 6474559 9249370 9960860 12949118 18498740 25898236 32372795 64745590 129491180
• Sum of all divisors σ(n): 337464960
• Sum of proper divisors (its aliquot sum) s(n): 207973780
• 129491180 is an abundant number, because the sum of its proper divisors (207973780) is greater than itself. Its abundance is 78482600

Bases of 129491180

• Binary: 111101101111110000011101100₂
• Hexadecimal: 0x7B7E0EC
• Base-36: 253G18

Squares and roots of 129491180

• 129491180 squared (129491180²) is 16767965697792400
• 129491180 cubed (129491180³) is 2171303664406661271032000
• The square root of 129491180 is 11379.4191415909
• The cube root of 129491180 is 505.9179201019

Scales and comparisons

• 129,491,180 seconds is equal to 4 years, 6 weeks, 17 hours, 46 minutes, 20 seconds.
• To count from 1 to 129,491,180 would take you about 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 129491180 cubic inches would be around 42.2 feet tall.

Recreational maths with 129491180

• 129491180 backwards is 081194921
• 129491180 is a Harshad number.
• The number of decimal digits it has is: 9
• The sum of 129491180's digits is 35
• More coming soon!