21394840
21,394,840 is an even composite number composed of five prime numbers multiplied together.
21394840 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 21394840:
23 × 5 × 17 × 73 × 431
(2 × 2 × 2 × 5 × 17 × 73 × 431)See below for interesting mathematical facts about the number 21394840 from the Numbermatics database.
Names of 21394840
- Cardinal: 21394840 can be written as Twenty-one million, three hundred ninety-four thousand, eight hundred forty.
Scientific notation
- Scientific notation: 2.139484 × 107
Factors of 21394840
Divisors of 21394840
- Number of divisors d(n): 64
-
Complete list of divisors:
1 2 4 5 8 10 17 20 34 40 68 73 85 136 146 170 292 340 365 431 584 680 730 862 1241 1460 1724 2155 2482 2920 3448 4310 4964 6205 7327 8620 9928 12410 14654 17240 24820 29308 31463 36635 49640 58616 62926 73270 125852 146540 157315 251704 293080 314630 534871 629260 1069742 1258520 2139484 2674355 4278968 5348710 10697420 21394840
- Sum of all divisors σ(n): 51788160
- Sum of proper divisors (its aliquot sum) s(n): 30393320
- 21394840 is an abundant number, because the sum of its proper divisors (30393320) is greater than itself. Its abundance is 8998480
Bases of 21394840
- Binary: 10100011001110101100110002
- Hexadecimal: 0x1467598
- Base-36: CQKD4
Squares and roots of 21394840
- 21394840 squared (213948402) is 457739178625600
- 21394840 cubed (213948403) is 9793256488426131904000
-
The
square root of 21394840 is 4625.4556532303 -
The
cube root of 21394840 is 277.6107936241
Scales and comparisons
How big is 21394840?- 21,394,840 seconds is equal to 35 weeks, 2 days, 15 hours, 40 seconds.
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To count from 1 to 21,394,840 would take you about ten 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 21394840 cubic inches would be around 23.1 feet tall.
Recreational maths with 21394840
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The information we have on file for 21394840 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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