21990816
21,990,816 is an even composite number composed of four prime numbers multiplied together.
21990816 is an even composite number. It is composed of four distinct prime numbers multiplied together. It has a total of seventy-two divisors.
Prime factorization of 21990816:
25 × 32 × 29 × 2633
(2 × 2 × 2 × 2 × 2 × 3 × 3 × 29 × 2633)See below for interesting mathematical facts about the number 21990816 from the Numbermatics database.
Names of 21990816
- Cardinal: 21990816 can be written as Twenty-one million, nine hundred ninety thousand, eight hundred sixteen.
Scientific notation
- Scientific notation: 2.1990816 × 107
Factors of 21990816
Divisors of 21990816
- Number of divisors d(n): 72
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Complete list of divisors:
1 2 3 4 6 8 9 12 16 18 24 29 32 36 48 58 72 87 96 116 144 174 232 261 288 348 464 522 696 928 1044 1392 2088 2633 2784 4176 5266 7899 8352 10532 15798 21064 23697 31596 42128 47394 63192 76357 84256 94788 126384 152714 189576 229071 252768 305428 379152 458142 610856 687213 758304 916284 1221712 1374426 1832568 2443424 2748852 3665136 5497704 7330272 10995408 21990816
- Sum of all divisors σ(n): 64717380
- Sum of proper divisors (its aliquot sum) s(n): 42726564
- 21990816 is an abundant number, because the sum of its proper divisors (42726564) is greater than itself. Its abundance is 20735748
Bases of 21990816
- Binary: 10100111110001101101000002
- Hexadecimal: 0x14F8DA0
- Base-36: D3C80
Squares and roots of 21990816
- 21990816 squared (219908162) is 483595988345856
- 21990816 cubed (219908163) is 10634670398051863658496
-
The
square root of 21990816 is 4689.4366399387 -
The
cube root of 21990816 is 280.1649368367
Scales and comparisons
How big is 21990816?- 21,990,816 seconds is equal to 36 weeks, 2 days, 12 hours, 33 minutes, 36 seconds.
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To count from 1 to 21,990,816 would take you about two weeks!
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 21990816 cubic inches would be around 23.3 feet tall.
Recreational maths with 21990816
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The information we have on file for 21990816 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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