21390400
21,390,400 is an even composite number composed of four prime numbers multiplied together.
21390400 is an even composite number. It is composed of four distinct prime numbers multiplied together. It has a total of eighty-four divisors.
Prime factorization of 21390400:
26 × 52 × 29 × 461
(2 × 2 × 2 × 2 × 2 × 2 × 5 × 5 × 29 × 461)See below for interesting mathematical facts about the number 21390400 from the Numbermatics database.
Names of 21390400
- Cardinal: 21390400 can be written as Twenty-one million, three hundred ninety thousand, four hundred.
Scientific notation
- Scientific notation: 2.13904 × 107
Factors of 21390400
Divisors of 21390400
- Number of divisors d(n): 84
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Complete list of divisors:
1 2 4 5 8 10 16 20 25 29 32 40 50 58 64 80 100 116 145 160 200 232 290 320 400 461 464 580 725 800 922 928 1160 1450 1600 1844 1856 2305 2320 2900 3688 4610 4640 5800 7376 9220 9280 11525 11600 13369 14752 18440 23050 23200 26738 29504 36880 46100 46400 53476 66845 73760 92200 106952 133690 147520 184400 213904 267380 334225 368800 427808 534760 668450 737600 855616 1069520 1336900 2139040 2673800 4278080 5347600 10695200 21390400
- Sum of all divisors σ(n): 54566820
- Sum of proper divisors (its aliquot sum) s(n): 33176420
- 21390400 is an abundant number, because the sum of its proper divisors (33176420) is greater than itself. Its abundance is 11786020
Bases of 21390400
- Binary: 10100011001100100010000002
- Hexadecimal: 0x1466440
- Base-36: CQGXS
Squares and roots of 21390400
- 21390400 squared (213904002) is 457549212160000
- 21390400 cubed (213904003) is 9787160667787264000000
-
The
square root of 21390400 is 4624.9756756117 -
The
cube root of 21390400 is 277.5915884137
Scales and comparisons
How big is 21390400?- 21,390,400 seconds is equal to 35 weeks, 2 days, 13 hours, 46 minutes, 40 seconds.
-
To count from 1 to 21,390,400 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 21390400 cubic inches would be around 23.1 feet tall.
Recreational maths with 21390400
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The information we have on file for 21390400 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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