81138816
81,138,816 is an even composite number composed of five prime numbers multiplied together.
81138816 is an even composite number. It is composed of five distinct prime numbers multiplied together. It has a total of one hundred ninety-two divisors.
Prime factorization of 81138816:
27 × 32 × 11 × 19 × 337
(2 × 2 × 2 × 2 × 2 × 2 × 2 × 3 × 3 × 11 × 19 × 337)See below for interesting mathematical facts about the number 81138816 from the Numbermatics database.
Names of 81138816
- Cardinal: 81138816 can be written as Eighty-one million, one hundred thirty-eight thousand, eight hundred sixteen.
Scientific notation
- Scientific notation: 8.1138816 × 107
Factors of 81138816
Divisors of 81138816
- Number of divisors d(n): 192
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Complete list of divisors:
1 2 3 4 6 8 9 11 12 16 18 19 22 24 32 33 36 38 44 48 57 64 66 72 76 88 96 99 114 128 132 144 152 171 176 192 198 209 228 264 288 304 337 342 352 384 396 418 456 528 576 608 627 674 684 704 792 836 912 1011 1056 1152 1216 1254 1348 1368 1408 1584 1672 1824 1881 2022 2112 2432 2508 2696 2736 3033 3168 3344 3648 3707 3762 4044 4224 5016 5392 5472 6066 6336 6403 6688 7296 7414 7524 8088 10032 10784 10944 11121 12132 12672 12806 13376 14828 15048 16176 19209 20064 21568 21888 22242 24264 25612 26752 29656 30096 32352 33363 38418 40128 43136 44484 48528 51224 57627 59312 60192 64704 66726 70433 76836 80256 88968 97056 102448 115254 118624 120384 129408 133452 140866 153672 177936 194112 204896 211299 230508 237248 240768 266904 281732 307344 355872 388224 409792 422598 461016 474496 533808 563464 614688 633897 711744 819584 845196 922032 1067616 1126928 1229376 1267794 1423488 1690392 1844064 2135232 2253856 2458752 2535588 3380784 3688128 4270464 4507712 5071176 6761568 7376256 9015424 10142352 13523136 20284704 27046272 40569408 81138816
- Sum of all divisors σ(n): 268912800
- Sum of proper divisors (its aliquot sum) s(n): 187773984
- 81138816 is an abundant number, because the sum of its proper divisors (187773984) is greater than itself. Its abundance is 106635168
Bases of 81138816
- Binary: 1001101011000010100100000002
- Hexadecimal: 0x4D61480
- Base-36: 1CB340
Squares and roots of 81138816
- 81138816 squared (811388162) is 6583507461881856
- 81138816 cubed (811388163) is 534178000584258927722496
-
The
square root of 81138816 is 9007.7086986647 -
The
cube root of 81138816 is 432.9218995549
Scales and comparisons
How big is 81138816?- 81,138,816 seconds is equal to 2 years, 30 weeks, 1 day, 2 hours, 33 minutes, 36 seconds.
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To count from 1 to 81,138,816 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 81138816 cubic inches would be around 36.1 feet tall.
Recreational maths with 81138816
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The information we have on file for 81138816 includes mathematical data and numerical statistics calculated using standard algorithms and methods. We are adding more all the time. If there are any features you would like to see, please contact us. Information provided for educational use, intellectual curiosity and fun!
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