21028644
21,028,644 is an even composite number composed of five prime numbers multiplied together.
21028644 is an even composite number. It is composed of five distinct prime numbers multiplied together. It has a total of one hundred forty-four divisors.
Prime factorization of 21028644:
22 × 32 × 73 × 13 × 131
(2 × 2 × 3 × 3 × 7 × 7 × 7 × 13 × 131)See below for interesting mathematical facts about the number 21028644 from the Numbermatics database.
Names of 21028644
- Cardinal: 21028644 can be written as Twenty-one million, twenty-eight thousand, six hundred forty-four.
Scientific notation
- Scientific notation: 2.1028644 × 107
Factors of 21028644
Divisors of 21028644
- Number of divisors d(n): 144
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Complete list of divisors:
1 2 3 4 6 7 9 12 13 14 18 21 26 28 36 39 42 49 52 63 78 84 91 98 117 126 131 147 156 182 196 234 252 262 273 294 343 364 393 441 468 524 546 588 637 686 786 819 882 917 1029 1092 1179 1274 1372 1572 1638 1703 1764 1834 1911 2058 2358 2548 2751 3087 3276 3406 3668 3822 4116 4459 4716 5109 5502 5733 6174 6419 6812 7644 8253 8918 10218 11004 11466 11921 12348 12838 13377 15327 16506 17836 19257 20436 22932 23842 25676 26754 30654 33012 35763 38514 40131 44933 47684 53508 57771 61308 71526 77028 80262 83447 89866 107289 115542 134799 143052 160524 166894 179732 214578 231084 250341 269598 333788 404397 429156 500682 539196 584129 751023 808794 1001364 1168258 1502046 1617588 1752387 2336516 3004092 3504774 5257161 7009548 10514322 21028644
- Sum of all divisors σ(n): 67267200
- Sum of proper divisors (its aliquot sum) s(n): 46238556
- 21028644 is an abundant number, because the sum of its proper divisors (46238556) is greater than itself. Its abundance is 25209912
Bases of 21028644
- Binary: 10100000011011111001001002
- Hexadecimal: 0x140DF24
- Base-36: CIPT0
Squares and roots of 21028644
- 21028644 squared (210286442) is 442203868478736
- 21028644 cubed (210286443) is 9298947725662160913984
-
The
square root of 21028644 is 4585.6999465731 -
The
cube root of 21028644 is 276.0177997343
Scales and comparisons
How big is 21028644?- 21,028,644 seconds is equal to 34 weeks, 5 days, 9 hours, 17 minutes, 24 seconds.
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To count from 1 to 21,028,644 would take you about fifty-six minutes!
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 21028644 cubic inches would be around 23 feet tall.
Recreational maths with 21028644
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The information we have on file for 21028644 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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