21389808
21,389,808 is an even composite number composed of five prime numbers multiplied together.
21389808 is an even composite number. It is composed of five distinct prime numbers multiplied together. It has a total of eighty divisors.
Prime factorization of 21389808:
24 × 3 × 11 × 17 × 2383
(2 × 2 × 2 × 2 × 3 × 11 × 17 × 2383)See below for interesting mathematical facts about the number 21389808 from the Numbermatics database.
Names of 21389808
- Cardinal: 21389808 can be written as Twenty-one million, three hundred eighty-nine thousand, eight hundred eight.
Scientific notation
- Scientific notation: 2.1389808 × 107
Factors of 21389808
Divisors of 21389808
- Number of divisors d(n): 80
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Complete list of divisors:
1 2 3 4 6 8 11 12 16 17 22 24 33 34 44 48 51 66 68 88 102 132 136 176 187 204 264 272 374 408 528 561 748 816 1122 1496 2244 2383 2992 4488 4766 7149 8976 9532 14298 19064 26213 28596 38128 40511 52426 57192 78639 81022 104852 114384 121533 157278 162044 209704 243066 314556 324088 419408 445621 486132 629112 648176 891242 972264 1258224 1336863 1782484 1944528 2673726 3564968 5347452 7129936 10694904 21389808
- Sum of all divisors σ(n): 63853056
- Sum of proper divisors (its aliquot sum) s(n): 42463248
- 21389808 is an abundant number, because the sum of its proper divisors (42463248) is greater than itself. Its abundance is 21073440
Bases of 21389808
- Binary: 10100011001100001111100002
- Hexadecimal: 0x14661F0
- Base-36: CQGHC
Squares and roots of 21389808
- 21389808 squared (213898082) is 457523886276864
- 21389808 cubed (213898083) is 9786348082875955802112
-
The
square root of 21389808 is 4624.9116748323 -
The
cube root of 21389808 is 277.5890275183
Scales and comparisons
How big is 21389808?- 21,389,808 seconds is equal to 35 weeks, 2 days, 13 hours, 36 minutes, 48 seconds.
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To count from 1 to 21,389,808 would take you about eight hours!
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 21389808 cubic inches would be around 23.1 feet tall.
Recreational maths with 21389808
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The information we have on file for 21389808 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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