129987990
129,987,990 is an even composite number composed of five prime numbers multiplied together.
129987990 is an even composite number. It is composed of five distinct prime numbers multiplied together. It has a total of one hundred twelve divisors.
Prime factorization of 129987990:
2 × 36 × 5 × 11 × 1621
(2 × 3 × 3 × 3 × 3 × 3 × 3 × 5 × 11 × 1621)See below for interesting mathematical facts about the number 129987990 from the Numbermatics database.
Names of 129987990
- Cardinal: 129987990 can be written as One hundred twenty-nine million, nine hundred eighty-seven thousand, nine hundred ninety.
Scientific notation
- Scientific notation: 1.2998799 × 108
Factors of 129987990
Divisors of 129987990
- Number of divisors d(n): 112
-
Complete list of divisors:
1 2 3 5 6 9 10 11 15 18 22 27 30 33 45 54 55 66 81 90 99 110 135 162 165 198 243 270 297 330 405 486 495 594 729 810 891 990 1215 1458 1485 1621 1782 2430 2673 2970 3242 3645 4455 4863 5346 7290 8019 8105 8910 9726 13365 14589 16038 16210 17831 24315 26730 29178 35662 40095 43767 48630 53493 72945 80190 87534 89155 106986 131301 145890 160479 178310 218835 262602 267465 320958 393903 437670 481437 534930 656505 787806 802395 962874 1181709 1313010 1444311 1604790 1969515 2363418 2407185 2888622 3939030 4332933 4814370 5908545 7221555 8665866 11817090 12998799 14443110 21664665 25997598 43329330 64993995 129987990
- Sum of all divisors σ(n): 382934736
- Sum of proper divisors (its aliquot sum) s(n): 252946746
- 129987990 is an abundant number, because the sum of its proper divisors (252946746) is greater than itself. Its abundance is 122958756
Bases of 129987990
- Binary: 1111011111101110101100101102
- Hexadecimal: 0x7BF7596
- Base-36: 25E3DI
Squares and roots of 129987990
- 129987990 squared (1299879902) is 16896877544240100
- 129987990 cubed (1299879903) is 2196391149251906676399000
-
The
square root of 129987990 is 11401.2275654861 -
The
cube root of 129987990 is 506.5641013727
Scales and comparisons
How big is 129987990?- 129,987,990 seconds is equal to 4 years, 6 weeks, 6 days, 11 hours, 46 minutes, 30 seconds.
-
To count from 1 to 129,987,990 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 129987990 cubic inches would be around 42.2 feet tall.
Recreational maths with 129987990
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