21004728
21,004,728 is an even composite number composed of five prime numbers multiplied together.
21004728 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 21004728:
23 × 3 × 19 × 73 × 631
(2 × 2 × 2 × 3 × 19 × 73 × 631)See below for interesting mathematical facts about the number 21004728 from the Numbermatics database.
Names of 21004728
- Cardinal: 21004728 can be written as Twenty-one million, four thousand, seven hundred twenty-eight.
Scientific notation
- Scientific notation: 2.1004728 × 107
Factors of 21004728
Divisors of 21004728
- Number of divisors d(n): 64
-
Complete list of divisors:
1 2 3 4 6 8 12 19 24 38 57 73 76 114 146 152 219 228 292 438 456 584 631 876 1262 1387 1752 1893 2524 2774 3786 4161 5048 5548 7572 8322 11096 11989 15144 16644 23978 33288 35967 46063 47956 71934 92126 95912 138189 143868 184252 276378 287736 368504 552756 875197 1105512 1750394 2625591 3500788 5251182 7001576 10502364 21004728
- Sum of all divisors σ(n): 56121600
- Sum of proper divisors (its aliquot sum) s(n): 35116872
- 21004728 is an abundant number, because the sum of its proper divisors (35116872) is greater than itself. Its abundance is 14112144
Bases of 21004728
- Binary: 10100000010000001101110002
- Hexadecimal: 0x14081B8
- Base-36: CI7CO
Squares and roots of 21004728
- 21004728 squared (210047282) is 441198598353984
- 21004728 cubed (210047283) is 9267256552406681636352
-
The
square root of 21004728 is 4583.0915330157 -
The
cube root of 21004728 is 275.9131211535
Scales and comparisons
How big is 21004728?- 21,004,728 seconds is equal to 34 weeks, 5 days, 2 hours, 38 minutes, 48 seconds.
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To count from 1 to 21,004,728 would take you about fifteen 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 21004728 cubic inches would be around 23 feet tall.
Recreational maths with 21004728
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The information we have on file for 21004728 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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