129731328

Names of 129731328

• Cardinal: 129731328 can be written as One hundred twenty-nine million, seven hundred thirty-one thousand, three hundred twenty-eight.

Scientific notation

• Scientific notation: 1.29731328 × 10⁸

Factors of 129731328

• Number of distinct prime factors ω(n): 3
• Total number of prime factors Ω(n): 13
• Sum of prime factors: 142

Divisors of 129731328

• Number of divisors d(n): 108
• Complete list of divisors:
  1 2 3 4 6 8 9 12 16 18 24 27 32 36 48 54 64 72 96 108 128 137 144 192 216 256 274 288 384 411 432 548 576 768 822 864 1096 1152 1233 1644 1728 2192 2304 2466 3288 3456 3699 4384 4932 6576 6912 7398 8768 9864 13152 14796 17536 18769 19728 26304 29592 35072 37538 39456 52608 56307 59184 75076 78912 105216 112614 118368 150152 157824 168921 225228 236736 300304 315648 337842 450456 473472 506763 600608 675684 900912 946944 1013526 1201216 1351368 1801824 2027052 2402432 2702736 3603648 4054104 4804864 5405472 7207296 8108208 10810944 14414592 16216416 21621888 32432832 43243776 64865664 129731328
• Sum of all divisors σ(n): 386459080
• Sum of proper divisors (its aliquot sum) s(n): 256727752
• 129731328 is an abundant number, because the sum of its proper divisors (256727752) is greater than itself. Its abundance is 126996424

Bases of 129731328

• Binary: 111101110111000101100000000₂
• Hexadecimal: 0x7BB8B00
• Base-36: 258LC0

Squares and roots of 129731328

• 129731328 squared (129731328²) is 16830217464643584
• 129731328 cubed (129731328³) is 2183406462217005198999552
• The square root of 129731328 is 11389.9661105729
• The cube root of 129731328 is 506.2304771619

Scales and comparisons

• 129,731,328 seconds is equal to 4 years, 6 weeks, 3 days, 12 hours, 28 minutes, 48 seconds.
• To count from 1 to 129,731,328 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 129731328 cubic inches would be around 42.2 feet tall.

Recreational maths with 129731328

• 129731328 backwards is 823137921
• 129731328 is a Harshad number.
• The number of decimal digits it has is: 9
• The sum of 129731328's digits is 36
• More coming soon!