129168390

Names of 129168390

• Cardinal: 129168390 can be written as One hundred twenty-nine million, one hundred sixty-eight thousand, three hundred ninety.

Scientific notation

• Scientific notation: 1.2916839 × 10⁸

Factors of 129168390

• Number of distinct prime factors ω(n): 6
• Total number of prime factors Ω(n): 7
• Sum of prime factors: 445

Divisors of 129168390

• Number of divisors d(n): 96
• Complete list of divisors:
  1 2 3 5 6 10 13 15 26 30 39 65 73 78 130 146 169 195 219 338 349 365 390 438 507 698 730 845 949 1014 1047 1095 1690 1745 1898 2094 2190 2535 2847 3490 4537 4745 5070 5235 5694 9074 9490 10470 12337 13611 14235 22685 24674 25477 27222 28470 37011 45370 50954 58981 61685 68055 74022 76431 117962 123370 127385 136110 152862 176943 185055 254770 294905 331201 353886 370110 382155 589810 662402 764310 884715 993603 1656005 1769430 1987206 3312010 4305613 4968015 8611226 9936030 12916839 21528065 25833678 43056130 64584195 129168390
• Sum of all divisors σ(n): 341258400
• Sum of proper divisors (its aliquot sum) s(n): 212090010
• 129168390 is an abundant number, because the sum of its proper divisors (212090010) is greater than itself. Its abundance is 82921620

Bases of 129168390

• Binary: 111101100101111010000000110₂
• Hexadecimal: 0x7B2F406
• Base-36: 24WIYU

Squares and roots of 129168390

• 129168390 squared (129168390²) is 16684472975192100
• 129168390 cubed (129168390³) is 2155106512204073497719000
• The square root of 129168390 is 11365.2272304605
• The cube root of 129168390 is 505.4971935653

Scales and comparisons

• 129,168,390 seconds is equal to 4 years, 5 weeks, 4 days, 6 minutes, 30 seconds.
• To count from 1 to 129,168,390 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 129168390 cubic inches would be around 42.1 feet tall.

Recreational maths with 129168390

• 129168390 backwards is 093861921
• 129168390 is a Harshad number.
• The number of decimal digits it has is: 9
• The sum of 129168390's digits is 39
• More coming soon!