21428904
21,428,904 is an even composite number composed of five prime numbers multiplied together.
21428904 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 21428904:
23 × 3 × 7 × 229 × 557
(2 × 2 × 2 × 3 × 7 × 229 × 557)See below for interesting mathematical facts about the number 21428904 from the Numbermatics database.
Names of 21428904
- Cardinal: 21428904 can be written as Twenty-one million, four hundred twenty-eight thousand, nine hundred four.
Scientific notation
- Scientific notation: 2.1428904 × 107
Factors of 21428904
Divisors of 21428904
- Number of divisors d(n): 64
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Complete list of divisors:
1 2 3 4 6 7 8 12 14 21 24 28 42 56 84 168 229 458 557 687 916 1114 1374 1603 1671 1832 2228 2748 3206 3342 3899 4456 4809 5496 6412 6684 7798 9618 11697 12824 13368 15596 19236 23394 31192 38472 46788 93576 127553 255106 382659 510212 765318 892871 1020424 1530636 1785742 2678613 3061272 3571484 5357226 7142968 10714452 21428904
- Sum of all divisors σ(n): 61603200
- Sum of proper divisors (its aliquot sum) s(n): 40174296
- 21428904 is an abundant number, because the sum of its proper divisors (40174296) is greater than itself. Its abundance is 18745392
Bases of 21428904
- Binary: 10100011011111010101010002
- Hexadecimal: 0x146FAA8
- Base-36: CRANC
Squares and roots of 21428904
- 21428904 squared (214289042) is 459197926641216
- 21428904 cubed (214289043) is 9840108286993660107264
-
The
square root of 21428904 is 4629.1364205433 -
The
cube root of 21428904 is 277.7580490641
Scales and comparisons
How big is 21428904?- 21,428,904 seconds is equal to 35 weeks, 3 days, 28 minutes, 24 seconds.
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To count from 1 to 21,428,904 would take you about forty-two minutes!
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 21428904 cubic inches would be around 23.1 feet tall.
Recreational maths with 21428904
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The information we have on file for 21428904 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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