21213728
21,213,728 is an even composite number composed of five prime numbers multiplied together.
21213728 is an even composite number. It is composed of five distinct prime numbers multiplied together. It has a total of ninety-six divisors.
Prime factorization of 21213728:
25 × 19 × 23 × 37 × 41
(2 × 2 × 2 × 2 × 2 × 19 × 23 × 37 × 41)See below for interesting mathematical facts about the number 21213728 from the Numbermatics database.
Names of 21213728
- Cardinal: 21213728 can be written as Twenty-one million, two hundred thirteen thousand, seven hundred twenty-eight.
Scientific notation
- Scientific notation: 2.1213728 × 107
Factors of 21213728
Divisors of 21213728
- Number of divisors d(n): 96
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Complete list of divisors:
1 2 4 8 16 19 23 32 37 38 41 46 74 76 82 92 148 152 164 184 296 304 328 368 437 592 608 656 703 736 779 851 874 943 1184 1312 1406 1517 1558 1702 1748 1886 2812 3034 3116 3404 3496 3772 5624 6068 6232 6808 6992 7544 11248 12136 12464 13616 13984 15088 16169 17917 22496 24272 24928 27232 28823 30176 32338 34891 35834 48544 57646 64676 69782 71668 115292 129352 139564 143336 230584 258704 279128 286672 461168 517408 558256 573344 662929 922336 1116512 1325858 2651716 5303432 10606864 21213728
- Sum of all divisors σ(n): 48263040
- Sum of proper divisors (its aliquot sum) s(n): 27049312
- 21213728 is an abundant number, because the sum of its proper divisors (27049312) is greater than itself. Its abundance is 5835584
Bases of 21213728
- Binary: 10100001110110010001000002
- Hexadecimal: 0x143B220
- Base-36: CMOM8
Squares and roots of 21213728
- 21213728 squared (212137282) is 450022255657984
- 21213728 cubed (212137283) is 9546649725474933604352
-
The
square root of 21213728 is 4605.8362975685 -
The
cube root of 21213728 is 276.8252274111
Scales and comparisons
How big is 21213728?- 21,213,728 seconds is equal to 35 weeks, 12 hours, 42 minutes, 8 seconds.
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To count from 1 to 21,213,728 would take you about four days!
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 21213728 cubic inches would be around 23.1 feet tall.
Recreational maths with 21213728
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The information we have on file for 21213728 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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