21388892
21,388,892 is an even composite number composed of five prime numbers multiplied together.
21388892 is an even composite number. It is composed of five distinct prime numbers multiplied together. It has a total of seventy-two divisors.
Prime factorization of 21388892:
22 × 72 × 29 × 53 × 71
(2 × 2 × 7 × 7 × 29 × 53 × 71)See below for interesting mathematical facts about the number 21388892 from the Numbermatics database.
Names of 21388892
- Cardinal: 21388892 can be written as Twenty-one million, three hundred eighty-eight thousand, eight hundred ninety-two.
Scientific notation
- Scientific notation: 2.1388892 × 107
Factors of 21388892
Divisors of 21388892
- Number of divisors d(n): 72
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Complete list of divisors:
1 2 4 7 14 28 29 49 53 58 71 98 106 116 142 196 203 212 284 371 406 497 742 812 994 1421 1484 1537 1988 2059 2597 2842 3074 3479 3763 4118 5194 5684 6148 6958 7526 8236 10388 10759 13916 14413 15052 21518 26341 28826 43036 52682 57652 75313 100891 105364 109127 150626 184387 201782 218254 301252 368774 403564 436508 737548 763889 1527778 3055556 5347223 10694446 21388892
- Sum of all divisors σ(n): 46539360
- Sum of proper divisors (its aliquot sum) s(n): 25150468
- 21388892 is an abundant number, because the sum of its proper divisors (25150468) is greater than itself. Its abundance is 3761576
Bases of 21388892
- Binary: 10100011001011110010111002
- Hexadecimal: 0x1465E5C
- Base-36: CQFRW
Squares and roots of 21388892
- 21388892 squared (213888922) is 457484700987664
- 21388892 cubed (213888923) is 9785090861077438628288
-
The
square root of 21388892 is 4624.8126448539 -
The
cube root of 21388892 is 277.5850649585
Scales and comparisons
How big is 21388892?- 21,388,892 seconds is equal to 35 weeks, 2 days, 13 hours, 21 minutes, 32 seconds.
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To count from 1 to 21,388,892 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 21388892 cubic inches would be around 23.1 feet tall.
Recreational maths with 21388892
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The information we have on file for 21388892 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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