81664290
81,664,290 is an even composite number composed of six prime numbers multiplied together.
81664290 is an even composite number. It is composed of six distinct prime numbers multiplied together. It has a total of ninety-six divisors.
Prime factorization of 81664290:
2 × 32 × 5 × 29 × 67 × 467
(2 × 3 × 3 × 5 × 29 × 67 × 467)See below for interesting mathematical facts about the number 81664290 from the Numbermatics database.
Names of 81664290
- Cardinal: 81664290 can be written as Eighty-one million, six hundred sixty-four thousand, two hundred ninety.
Scientific notation
- Scientific notation: 8.166429 × 107
Factors of 81664290
Divisors of 81664290
- Number of divisors d(n): 96
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Complete list of divisors:
1 2 3 5 6 9 10 15 18 29 30 45 58 67 87 90 134 145 174 201 261 290 335 402 435 467 522 603 670 870 934 1005 1206 1305 1401 1943 2010 2335 2610 2802 3015 3886 4203 4670 5829 6030 7005 8406 9715 11658 13543 14010 17487 19430 21015 27086 29145 31289 34974 40629 42030 58290 62578 67715 81258 87435 93867 121887 135430 156445 174870 187734 203145 243774 281601 312890 406290 469335 563202 609435 907381 938670 1218870 1408005 1814762 2722143 2816010 4536905 5444286 8166429 9073810 13610715 16332858 27221430 40832145 81664290
- Sum of all divisors σ(n): 223404480
- Sum of proper divisors (its aliquot sum) s(n): 141740190
- 81664290 is an abundant number, because the sum of its proper divisors (141740190) is greater than itself. Its abundance is 60075900
Bases of 81664290
- Binary: 1001101111000011001001000102
- Hexadecimal: 0x4DE1922
- Base-36: 1CMCKI
Squares and roots of 81664290
- 81664290 squared (816642902) is 6669056261204100
- 81664290 cubed (816642903) is 544623744541287371589000
-
The
square root of 81664290 is 9036.8296431879 -
The
cube root of 81664290 is 433.8544572037
Scales and comparisons
How big is 81664290?- 81,664,290 seconds is equal to 2 years, 31 weeks, 4 hours, 31 minutes, 30 seconds.
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To count from 1 to 81,664,290 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 81664290 cubic inches would be around 36.2 feet tall.
Recreational maths with 81664290
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The information we have on file for 81664290 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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