21428064
21,428,064 is an even composite number composed of four prime numbers multiplied together.
21428064 is an even composite number. It is composed of four distinct prime numbers multiplied together. It has a total of one hundred twenty divisors.
Prime factorization of 21428064:
25 × 34 × 7 × 1181
(2 × 2 × 2 × 2 × 2 × 3 × 3 × 3 × 3 × 7 × 1181)See below for interesting mathematical facts about the number 21428064 from the Numbermatics database.
Names of 21428064
- Cardinal: 21428064 can be written as Twenty-one million, four hundred twenty-eight thousand and sixty-four.
Scientific notation
- Scientific notation: 2.1428064 × 107
Factors of 21428064
Divisors of 21428064
- Number of divisors d(n): 120
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Complete list of divisors:
1 2 3 4 6 7 8 9 12 14 16 18 21 24 27 28 32 36 42 48 54 56 63 72 81 84 96 108 112 126 144 162 168 189 216 224 252 288 324 336 378 432 504 567 648 672 756 864 1008 1134 1181 1296 1512 2016 2268 2362 2592 3024 3543 4536 4724 6048 7086 8267 9072 9448 10629 14172 16534 18144 18896 21258 24801 28344 31887 33068 37792 42516 49602 56688 63774 66136 74403 85032 95661 99204 113376 127548 132272 148806 170064 191322 198408 223209 255096 264544 297612 340128 382644 396816 446418 510192 595224 669627 765288 793632 892836 1020384 1190448 1339254 1530576 1785672 2380896 2678508 3061152 3571344 5357016 7142688 10714032 21428064
- Sum of all divisors σ(n): 72083088
- Sum of proper divisors (its aliquot sum) s(n): 50655024
- 21428064 is an abundant number, because the sum of its proper divisors (50655024) is greater than itself. Its abundance is 29226960
Bases of 21428064
- Binary: 10100011011110111011000002
- Hexadecimal: 0x146F760
- Base-36: CRA00
Squares and roots of 21428064
- 21428064 squared (214280642) is 459161926788096
- 21428064 cubed (214280643) is 9838951153578635526144
-
The
square root of 21428064 is 4629.0456899883 -
The
cube root of 21428064 is 277.7544197011
Scales and comparisons
How big is 21428064?- 21,428,064 seconds is equal to 35 weeks, 3 days, 14 minutes, 24 seconds.
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To count from 1 to 21,428,064 would take you about twenty-one 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 21428064 cubic inches would be around 23.1 feet tall.
Recreational maths with 21428064
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