21389256
21,389,256 is an even composite number composed of five prime numbers multiplied together.
21389256 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 21389256:
23 × 32 × 7 × 31 × 372
(2 × 2 × 2 × 3 × 3 × 7 × 31 × 37 × 37)See below for interesting mathematical facts about the number 21389256 from the Numbermatics database.
Names of 21389256
- Cardinal: 21389256 can be written as Twenty-one million, three hundred eighty-nine thousand, two hundred fifty-six.
Scientific notation
- Scientific notation: 2.1389256 × 107
Factors of 21389256
Divisors of 21389256
- Number of divisors d(n): 144
-
Complete list of divisors:
1 2 3 4 6 7 8 9 12 14 18 21 24 28 31 36 37 42 56 62 63 72 74 84 93 111 124 126 148 168 186 217 222 248 252 259 279 296 333 372 434 444 504 518 558 651 666 744 777 868 888 1036 1116 1147 1302 1332 1369 1554 1736 1953 2072 2232 2294 2331 2604 2664 2738 3108 3441 3906 4107 4588 4662 5208 5476 6216 6882 7812 8029 8214 9176 9324 9583 10323 10952 12321 13764 15624 16058 16428 18648 19166 20646 24087 24642 27528 28749 32116 32856 38332 41292 42439 48174 49284 57498 64232 72261 76664 82584 84878 86247 96348 98568 114996 127317 144522 169756 172494 192696 229992 254634 289044 297073 339512 344988 381951 509268 578088 594146 689976 763902 891219 1018536 1188292 1527804 1782438 2376584 2673657 3055608 3564876 5347314 7129752 10694628 21389256
- Sum of all divisors σ(n): 70237440
- Sum of proper divisors (its aliquot sum) s(n): 48848184
- 21389256 is an abundant number, because the sum of its proper divisors (48848184) is greater than itself. Its abundance is 27458928
Bases of 21389256
- Binary: 10100011001011111110010002
- Hexadecimal: 0x1465FC8
- Base-36: CQG20
Squares and roots of 21389256
- 21389256 squared (213892562) is 457500272233536
- 21389256 cubed (213892563) is 9785590442872793289216
-
The
square root of 21389256 is 4624.8519976319 -
The
cube root of 21389256 is 277.5866396137
Scales and comparisons
How big is 21389256?- 21,389,256 seconds is equal to 35 weeks, 2 days, 13 hours, 27 minutes, 36 seconds.
-
To count from 1 to 21,389,256 would take you about eight 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 21389256 cubic inches would be around 23.1 feet tall.
Recreational maths with 21389256
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