21427840
21,427,840 is an even composite number composed of four prime numbers multiplied together.
21427840 is an even composite number. It is composed of four distinct prime numbers multiplied together. It has a total of sixty-four divisors.
Prime factorization of 21427840:
27 × 5 × 7 × 4783
(2 × 2 × 2 × 2 × 2 × 2 × 2 × 5 × 7 × 4783)See below for interesting mathematical facts about the number 21427840 from the Numbermatics database.
Names of 21427840
- Cardinal: 21427840 can be written as Twenty-one million, four hundred twenty-seven thousand, eight hundred forty.
Scientific notation
- Scientific notation: 2.142784 × 107
Factors of 21427840
Divisors of 21427840
- Number of divisors d(n): 64
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Complete list of divisors:
1 2 4 5 7 8 10 14 16 20 28 32 35 40 56 64 70 80 112 128 140 160 224 280 320 448 560 640 896 1120 2240 4480 4783 9566 19132 23915 33481 38264 47830 66962 76528 95660 133924 153056 167405 191320 267848 306112 334810 382640 535696 612224 669620 765280 1071392 1339240 1530560 2142784 2678480 3061120 4285568 5356960 10713920 21427840
- Sum of all divisors σ(n): 58556160
- Sum of proper divisors (its aliquot sum) s(n): 37128320
- 21427840 is an abundant number, because the sum of its proper divisors (37128320) is greater than itself. Its abundance is 15700480
Bases of 21427840
- Binary: 10100011011110110100000002
- Hexadecimal: 0x146F680
- Base-36: CR9TS
Squares and roots of 21427840
- 21427840 squared (214278402) is 459152327065600
- 21427840 cubed (214278403) is 9838642599989346304000
-
The
square root of 21427840 is 4629.0214948735 -
The
cube root of 21427840 is 277.7534518549
Scales and comparisons
How big is 21427840?- 21,427,840 seconds is equal to 35 weeks, 3 days, 10 minutes, 40 seconds.
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To count from 1 to 21,427,840 would take you about sixteen minutes!
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 21427840 cubic inches would be around 23.1 feet tall.
Recreational maths with 21427840
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The information we have on file for 21427840 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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