21681408
21,681,408 is an even composite number composed of five prime numbers multiplied together.
21681408 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 21681408:
28 × 3 × 7 × 37 × 109
(2 × 2 × 2 × 2 × 2 × 2 × 2 × 2 × 3 × 7 × 37 × 109)See below for interesting mathematical facts about the number 21681408 from the Numbermatics database.
Names of 21681408
- Cardinal: 21681408 can be written as Twenty-one million, six hundred eighty-one thousand, four hundred eight.
Scientific notation
- Scientific notation: 2.1681408 × 107
Factors of 21681408
Divisors of 21681408
- Number of divisors d(n): 144
-
Complete list of divisors:
1 2 3 4 6 7 8 12 14 16 21 24 28 32 37 42 48 56 64 74 84 96 109 111 112 128 148 168 192 218 222 224 256 259 296 327 336 384 436 444 448 518 592 654 672 763 768 777 872 888 896 1036 1184 1308 1344 1526 1554 1744 1776 1792 2072 2289 2368 2616 2688 3052 3108 3488 3552 4033 4144 4578 4736 5232 5376 6104 6216 6976 7104 8066 8288 9156 9472 10464 12099 12208 12432 13952 14208 16132 16576 18312 20928 24198 24416 24864 27904 28231 28416 32264 33152 36624 41856 48396 48832 49728 56462 64528 66304 73248 83712 84693 96792 97664 99456 112924 129056 146496 169386 193584 195328 198912 225848 258112 292992 338772 387168 451696 516224 585984 677544 774336 903392 1032448 1355088 1548672 1806784 2710176 3097344 3613568 5420352 7227136 10840704 21681408
- Sum of all divisors σ(n): 68351360
- Sum of proper divisors (its aliquot sum) s(n): 46669952
- 21681408 is an abundant number, because the sum of its proper divisors (46669952) is greater than itself. Its abundance is 24988544
Bases of 21681408
- Binary: 10100101011010101000000002
- Hexadecimal: 0x14AD500
- Base-36: CWPHC
Squares and roots of 21681408
- 21681408 squared (216814082) is 470083452862464
- 21681408 cubed (216814083) is 10192071135559849869312
-
The
square root of 21681408 is 4656.3298852207 -
The
cube root of 21681408 is 278.8447640429
Scales and comparisons
How big is 21681408?- 21,681,408 seconds is equal to 35 weeks, 5 days, 22 hours, 36 minutes, 48 seconds.
-
To count from 1 to 21,681,408 would take you about five days!
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 21681408 cubic inches would be around 23.2 feet tall.
Recreational maths with 21681408
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The information we have on file for 21681408 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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