21729664
21,729,664 is an even composite number composed of four prime numbers multiplied together.
21729664 is an even composite number. It is composed of four distinct prime numbers multiplied together. It has a total of ninety-six divisors.
Prime factorization of 21729664:
27 × 112 × 23 × 61
(2 × 2 × 2 × 2 × 2 × 2 × 2 × 11 × 11 × 23 × 61)See below for interesting mathematical facts about the number 21729664 from the Numbermatics database.
Names of 21729664
- Cardinal: 21729664 can be written as Twenty-one million, seven hundred twenty-nine thousand, six hundred sixty-four.
Scientific notation
- Scientific notation: 2.1729664 × 107
Factors of 21729664
Divisors of 21729664
- Number of divisors d(n): 96
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Complete list of divisors:
1 2 4 8 11 16 22 23 32 44 46 61 64 88 92 121 122 128 176 184 242 244 253 352 368 484 488 506 671 704 736 968 976 1012 1342 1403 1408 1472 1936 1952 2024 2684 2783 2806 2944 3872 3904 4048 5368 5566 5612 7381 7744 7808 8096 10736 11132 11224 14762 15433 15488 16192 21472 22264 22448 29524 30866 32384 42944 44528 44896 59048 61732 85888 89056 89792 118096 123464 169763 178112 179584 236192 246928 339526 356224 472384 493856 679052 944768 987712 1358104 1975424 2716208 5432416 10864832 21729664
- Sum of all divisors σ(n): 50465520
- Sum of proper divisors (its aliquot sum) s(n): 28735856
- 21729664 is an abundant number, because the sum of its proper divisors (28735856) is greater than itself. Its abundance is 7006192
Bases of 21729664
- Binary: 10100101110010001100000002
- Hexadecimal: 0x14B9180
- Base-36: CXQPS
Squares and roots of 21729664
- 21729664 squared (217296642) is 472178297552896
- 21729664 cubed (217296643) is 10260275753916452306944
-
The
square root of 21729664 is 4661.5087686285 -
The
cube root of 21729664 is 279.0514843561
Scales and comparisons
How big is 21729664?- 21,729,664 seconds is equal to 35 weeks, 6 days, 12 hours, 1 minute, 4 seconds.
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To count from 1 to 21,729,664 would take you about six 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 21729664 cubic inches would be around 23.3 feet tall.
Recreational maths with 21729664
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The information we have on file for 21729664 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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