21456864
21,456,864 is an even composite number composed of five prime numbers multiplied together.
21456864 is an even composite number. It is composed of five distinct prime numbers multiplied together. It has a total of one hundred forty-four divisors.
Prime factorization of 21456864:
25 × 32 × 11 × 13 × 521
(2 × 2 × 2 × 2 × 2 × 3 × 3 × 11 × 13 × 521)See below for interesting mathematical facts about the number 21456864 from the Numbermatics database.
Names of 21456864
- Cardinal: 21456864 can be written as Twenty-one million, four hundred fifty-six thousand, eight hundred sixty-four.
Scientific notation
- Scientific notation: 2.1456864 × 107
Factors of 21456864
Divisors of 21456864
- Number of divisors d(n): 144
-
Complete list of divisors:
1 2 3 4 6 8 9 11 12 13 16 18 22 24 26 32 33 36 39 44 48 52 66 72 78 88 96 99 104 117 132 143 144 156 176 198 208 234 264 286 288 312 352 396 416 429 468 521 528 572 624 792 858 936 1042 1056 1144 1248 1287 1563 1584 1716 1872 2084 2288 2574 3126 3168 3432 3744 4168 4576 4689 5148 5731 6252 6773 6864 8336 9378 10296 11462 12504 13546 13728 16672 17193 18756 20319 20592 22924 25008 27092 34386 37512 40638 41184 45848 50016 51579 54184 60957 68772 74503 75024 81276 91696 103158 108368 121914 137544 149006 150048 162552 183392 206316 216736 223509 243828 275088 298012 325104 412632 447018 487656 550176 596024 650208 670527 825264 894036 975312 1192048 1341054 1650528 1788072 1950624 2384096 2682108 3576144 5364216 7152288 10728432 21456864
- Sum of all divisors σ(n): 71823024
- Sum of proper divisors (its aliquot sum) s(n): 50366160
- 21456864 is an abundant number, because the sum of its proper divisors (50366160) is greater than itself. Its abundance is 28909296
Bases of 21456864
- Binary: 10100011101100111111000002
- Hexadecimal: 0x14767E0
- Base-36: CRW80
Squares and roots of 21456864
- 21456864 squared (214568642) is 460397012714496
- 21456864 cubed (214568643) is 9878676087821211500544
-
The
square root of 21456864 is 4632.1554378065 -
The
cube root of 21456864 is 277.8788009203
Scales and comparisons
How big is 21456864?- 21,456,864 seconds is equal to 35 weeks, 3 days, 8 hours, 14 minutes, 24 seconds.
-
To count from 1 to 21,456,864 would take you about twelve 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 21456864 cubic inches would be around 23.2 feet tall.
Recreational maths with 21456864
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