72138990
72,138,990 is an even composite number composed of seven prime numbers multiplied together.
72138990 is an even composite number. It is composed of seven distinct prime numbers multiplied together. It has a total of one hundred ninety-two divisors.
Prime factorization of 72138990:
2 × 3 × 5 × 7 × 112 × 17 × 167
(2 × 3 × 5 × 7 × 11 × 11 × 17 × 167)See below for interesting mathematical facts about the number 72138990 from the Numbermatics database.
Names of 72138990
- Cardinal: 72138990 can be written as Seventy-two million, one hundred thirty-eight thousand, nine hundred ninety.
Scientific notation
- Scientific notation: 7.213899 × 107
Factors of 72138990
Divisors of 72138990
- Number of divisors d(n): 192
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Complete list of divisors:
1 2 3 5 6 7 10 11 14 15 17 21 22 30 33 34 35 42 51 55 66 70 77 85 102 105 110 119 121 154 165 167 170 187 210 231 238 242 255 330 334 357 363 374 385 462 501 510 561 595 605 714 726 770 835 847 935 1002 1122 1155 1169 1190 1210 1309 1670 1694 1785 1815 1837 1870 2057 2310 2338 2505 2541 2618 2805 2839 3507 3570 3630 3674 3927 4114 4235 5010 5082 5511 5610 5678 5845 6171 6545 7014 7854 8470 8517 9185 10285 11022 11690 12342 12705 12859 13090 14195 14399 17034 17535 18370 19635 19873 20207 20570 25410 25718 27555 28390 28798 30855 31229 35070 38577 39270 39746 40414 42585 43197 55110 59619 60621 61710 62458 64295 71995 77154 85170 86394 93687 99365 101035 119238 121242 128590 141449 143990 156145 187374 192885 198730 202070 215985 218603 282898 298095 303105 312290 343519 385770 424347 431970 437206 468435 596190 606210 655809 687038 707245 848694 936870 1030557 1093015 1311618 1414490 1717595 2061114 2121735 2186030 2404633 3279045 3435190 4243470 4809266 5152785 6558090 7213899 10305570 12023165 14427798 24046330 36069495 72138990
- Sum of all divisors σ(n): 231662592
- Sum of proper divisors (its aliquot sum) s(n): 159523602
- 72138990 is an abundant number, because the sum of its proper divisors (159523602) is greater than itself. Its abundance is 87384612
Bases of 72138990
- Binary: 1000100110011000000111011102
- Hexadecimal: 0x44CC0EE
- Base-36: 16Y6SU
Squares and roots of 72138990
- 72138990 squared (721389902) is 5204033878220100
- 72138990 cubed (721389903) is 375413747900581011699000
-
The
square root of 72138990 is 8493.4674897829 -
The
cube root of 72138990 is 416.2842877725
Scales and comparisons
How big is 72138990?- 72,138,990 seconds is equal to 2 years, 15 weeks, 1 day, 22 hours, 36 minutes, 30 seconds.
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To count from 1 to 72,138,990 would take you about three 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 72138990 cubic inches would be around 34.7 feet tall.
Recreational maths with 72138990
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