129999913890

Names of 129999913890

• Cardinal: 129999913890 can be written as One hundred twenty-nine billion, nine hundred ninety-nine million, nine hundred thirteen thousand, eight hundred ninety.

Scientific notation

• Scientific notation: 1.2999991389 × 10¹¹

Factors of 129999913890

• Number of distinct prime factors ω(n): 7
• Total number of prime factors Ω(n): 7
• Sum of prime factors: 145088

Divisors of 129999913890

• Number of divisors d(n): 128
• Complete list of divisors:
  1 2 3 5 6 7 10 11 14 15 21 22 30 33 35 42 55 66 70 77 105 110 154 165 210 231 330 385 389 462 770 778 1155 1167 1945 2310 2334 2723 3890 4279 5446 5835 8169 8558 11670 12837 13615 16338 21395 25674 27230 29953 40845 42790 59906 64185 81690 89859 128370 144671 149765 179718 289342 299530 434013 449295 723355 868026 898590 1012697 1446710 1591381 2025394 2170065 3038091 3182762 4340130 4774143 5063485 6076182 7956905 9548286 10126970 11139667 15190455 15913810 22279334 23870715 30380910 33419001 47741430 55698335 56277019 66838002 111396670 112554038 167095005 168831057 281385095 334190010 337662114 393939133 562770190 619047209 787878266 844155285 1181817399 1238094418 1688310570 1857141627 1969695665 2363634798 3095236045 3714283254 3939391330 4333330463 5909086995 6190472090 8666660926 9285708135 11818173990 12999991389 18571416270 21666652315 25999982778 43333304630 64999956945 129999913890
• Sum of all divisors σ(n): 389989416960
• Sum of proper divisors (its aliquot sum) s(n): 259989503070
• 129999913890 is an abundant number, because the sum of its proper divisors (259989503070) is greater than itself. Its abundance is 129989589180

Bases of 129999913890

• Binary: 1111001000100100110010100001110100010₂
• Hexadecimal: 0x1E449943A2
• Base-36: 1NPYLBJ6

Squares and roots of 129999913890

• 129999913890 squared (129999913890²) is 16899977611407414932100
• 129999913890 cubed (129999913890³) is 2196995634225891822880500196869000
• The square root of 129999913890 is 360555.0081332943
• The cube root of 129999913890 is 5065.7959005989

Scales and comparisons

• 129,999,913,890 seconds is equal to 4,133 years, 30 weeks, 6 days, 15 hours, 11 minutes, 30 seconds.
• To count from 1 to 129,999,913,890 would take you about eight thousand, two hundred sixty-seven 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 129999913890 cubic inches would be around 422.1 feet tall.

Recreational maths with 129999913890

• 129999913890 backwards is 098319999921
• The number of decimal digits it has is: 12
• The sum of 129999913890's digits is 69
• More coming soon!