21388590
21,388,590 is an even composite number composed of five prime numbers multiplied together.
21388590 is an even composite number. It is composed of five distinct prime numbers multiplied together. It has a total of sixty-four divisors.
Prime factorization of 21388590:
2 × 33 × 5 × 37 × 2141
(2 × 3 × 3 × 3 × 5 × 37 × 2141)See below for interesting mathematical facts about the number 21388590 from the Numbermatics database.
Names of 21388590
- Cardinal: 21388590 can be written as Twenty-one million, three hundred eighty-eight thousand, five hundred ninety.
Scientific notation
- Scientific notation: 2.138859 × 107
Factors of 21388590
Divisors of 21388590
- Number of divisors d(n): 64
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Complete list of divisors:
1 2 3 5 6 9 10 15 18 27 30 37 45 54 74 90 111 135 185 222 270 333 370 555 666 999 1110 1665 1998 2141 3330 4282 4995 6423 9990 10705 12846 19269 21410 32115 38538 57807 64230 79217 96345 115614 158434 192690 237651 289035 396085 475302 578070 712953 792170 1188255 1425906 2138859 2376510 3564765 4277718 7129530 10694295 21388590
- Sum of all divisors σ(n): 58605120
- Sum of proper divisors (its aliquot sum) s(n): 37216530
- 21388590 is an abundant number, because the sum of its proper divisors (37216530) is greater than itself. Its abundance is 15827940
Bases of 21388590
- Binary: 10100011001011101001011102
- Hexadecimal: 0x1465D2E
- Base-36: CQFJI
Squares and roots of 21388590
- 21388590 squared (213885902) is 457471782188100
- 21388590 cubed (213885903) is 9784676385790573779000
-
The
square root of 21388590 is 4624.7799947673 -
The
cube root of 21388590 is 277.5837585003
Scales and comparisons
How big is 21388590?- 21,388,590 seconds is equal to 35 weeks, 2 days, 13 hours, 16 minutes, 30 seconds.
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To count from 1 to 21,388,590 would take you about seven 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 21388590 cubic inches would be around 23.1 feet tall.
Recreational maths with 21388590
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The information we have on file for 21388590 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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