21288320
21,288,320 is an even composite number composed of five prime numbers multiplied together.
21288320 is an even composite number. It is composed of five distinct prime numbers multiplied together. It has a total of one hundred twenty-eight divisors.
Prime factorization of 21288320:
27 × 5 × 29 × 31 × 37
(2 × 2 × 2 × 2 × 2 × 2 × 2 × 5 × 29 × 31 × 37)See below for interesting mathematical facts about the number 21288320 from the Numbermatics database.
Names of 21288320
- Cardinal: 21288320 can be written as Twenty-one million, two hundred eighty-eight thousand, three hundred twenty.
Scientific notation
- Scientific notation: 2.128832 × 107
Factors of 21288320
Divisors of 21288320
- Number of divisors d(n): 128
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Complete list of divisors:
1 2 4 5 8 10 16 20 29 31 32 37 40 58 62 64 74 80 116 124 128 145 148 155 160 185 232 248 290 296 310 320 370 464 496 580 592 620 640 740 899 928 992 1073 1147 1160 1184 1240 1480 1798 1856 1984 2146 2294 2320 2368 2480 2960 3596 3712 3968 4292 4495 4588 4640 4736 4960 5365 5735 5920 7192 8584 8990 9176 9280 9920 10730 11470 11840 14384 17168 17980 18352 18560 19840 21460 22940 23680 28768 33263 34336 35960 36704 42920 45880 57536 66526 68672 71920 73408 85840 91760 115072 133052 137344 143840 146816 166315 171680 183520 266104 287680 332630 343360 367040 532208 575360 665260 686720 734080 1064416 1330520 2128832 2661040 4257664 5322080 10644160 21288320
- Sum of all divisors σ(n): 55814400
- Sum of proper divisors (its aliquot sum) s(n): 34526080
- 21288320 is an abundant number, because the sum of its proper divisors (34526080) is greater than itself. Its abundance is 13237760
Bases of 21288320
- Binary: 10100010011010101100000002
- Hexadecimal: 0x144D580
- Base-36: COA68
Squares and roots of 21288320
- 21288320 squared (212883202) is 453192568422400
- 21288320 cubed (212883203) is 9647708418197946368000
-
The
square root of 21288320 is 4613.9267441085 -
The
cube root of 21288320 is 277.1493067447
Scales and comparisons
How big is 21288320?- 21,288,320 seconds is equal to 35 weeks, 1 day, 9 hours, 25 minutes, 20 seconds.
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To count from 1 to 21,288,320 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 21288320 cubic inches would be around 23.1 feet tall.
Recreational maths with 21288320
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The information we have on file for 21288320 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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