21398728
21,398,728 is an even composite number composed of five prime numbers multiplied together.
What does the number 21398728 look like?
This visualization shows the relationship between its 5 prime factors (large circles) and 64 divisors.
21398728 is an even composite number. It is composed of five distinct prime numbers multiplied together. It has a total of sixty-four divisors.
Prime factorization of 21398728:
23 × 13 × 37 × 67 × 83
(2 × 2 × 2 × 13 × 37 × 67 × 83)See below for interesting mathematical facts about the number 21398728 from the Numbermatics database.
Names of 21398728
- Cardinal: 21398728 can be written as Twenty-one million, three hundred ninety-eight thousand, seven hundred twenty-eight.
Scientific notation
- Scientific notation: 2.1398728 × 107
Factors of 21398728
Divisors of 21398728
- Number of divisors d(n): 64
-
Complete list of divisors:
1 2 4 8 13 26 37 52 67 74 83 104 134 148 166 268 296 332 481 536 664 871 962 1079 1742 1924 2158 2479 3071 3484 3848 4316 4958 5561 6142 6968 8632 9916 11122 12284 19832 22244 24568 32227 39923 44488 64454 72293 79846 128908 144586 159692 205757 257816 289172 319384 411514 578344 823028 1646056 2674841 5349682 10699364 21398728
- Sum of all divisors σ(n): 45581760
- Sum of proper divisors (its aliquot sum) s(n): 24183032
- 21398728 is an abundant number, because the sum of its proper divisors (24183032) is greater than itself. Its abundance is 2784304
Bases of 21398728
- Binary: 10100011010000100110010002
- Hexadecimal: 0x14684C8
- Base-36: CQND4
Squares and roots of 21398728
- 21398728 squared (213987282) is 457905560017984
- 21398728 cubed (213987283) is 9798596528512514724352
-
The
square root of 21398728 is 4625.8759170561 -
The
cube root of 21398728 is 277.6276089775
Scales and comparisons
How big is 21398728?- 21,398,728 seconds is equal to 35 weeks, 2 days, 16 hours, 5 minutes, 28 seconds.
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To count from 1 to 21,398,728 would take you about twelve 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 21398728 cubic inches would be around 23.1 feet tall.
Recreational maths with 21398728
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The information we have on file for 21398728 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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