21478912
21,478,912 is an even composite number composed of four prime numbers multiplied together.
21478912 is an even composite number. It is composed of four distinct prime numbers multiplied together. It has a total of eighty divisors.
Prime factorization of 21478912:
29 × 7 × 13 × 461
(2 × 2 × 2 × 2 × 2 × 2 × 2 × 2 × 2 × 7 × 13 × 461)See below for interesting mathematical facts about the number 21478912 from the Numbermatics database.
Names of 21478912
- Cardinal: 21478912 can be written as Twenty-one million, four hundred seventy-eight thousand, nine hundred twelve.
Scientific notation
- Scientific notation: 2.1478912 × 107
Factors of 21478912
Divisors of 21478912
- Number of divisors d(n): 80
-
Complete list of divisors:
1 2 4 7 8 13 14 16 26 28 32 52 56 64 91 104 112 128 182 208 224 256 364 416 448 461 512 728 832 896 922 1456 1664 1792 1844 2912 3227 3328 3584 3688 5824 5993 6454 6656 7376 11648 11986 12908 14752 23296 23972 25816 29504 41951 46592 47944 51632 59008 83902 95888 103264 118016 167804 191776 206528 236032 335608 383552 413056 671216 767104 826112 1342432 1534208 1652224 2684864 3068416 5369728 10739456 21478912
- Sum of all divisors σ(n): 52934112
- Sum of proper divisors (its aliquot sum) s(n): 31455200
- 21478912 is an abundant number, because the sum of its proper divisors (31455200) is greater than itself. Its abundance is 9976288
Bases of 21478912
- Binary: 10100011110111110000000002
- Hexadecimal: 0x147BE00
- Base-36: CSD8G
Squares and roots of 21478912
- 21478912 squared (214789122) is 461343660703744
- 21478912 cubed (214789123) is 9909159890013575446528
-
The
square root of 21478912 is 4634.5347123525 -
The
cube root of 21478912 is 277.9739464569
Scales and comparisons
How big is 21478912?- 21,478,912 seconds is equal to 35 weeks, 3 days, 14 hours, 21 minutes, 52 seconds.
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To count from 1 to 21,478,912 would take you about twenty-one 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 21478912 cubic inches would be around 23.2 feet tall.
Recreational maths with 21478912
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