21388960

21,388,960 is an even composite number composed of four prime numbers multiplied together.

What does the number 21388960 look like?

This visualization shows the relationship between its 4 prime factors (large circles) and 48 divisors.

21388960 is an even composite number. It is composed of four distinct prime numbers multiplied together. It has a total of forty-eight divisors.

Prime factorization of 21388960:

2⁵ × 5 × 37 × 3613

(2 × 2 × 2 × 2 × 2 × 5 × 37 × 3613)

See below for interesting mathematical facts about the number 21388960 from the Numbermatics database.

Names of 21388960

Cardinal: 21388960 can be written as Twenty-one million, three hundred eighty-eight thousand, nine hundred sixty.

Scientific notation

Scientific notation: 2.138896 × 10⁷

Factors of 21388960

Number of distinct prime factors ω(n): 4
Total number of prime factors Ω(n): 8
Sum of prime factors: 3657

Divisors of 21388960

Number of divisors d(n): 48
Complete list of divisors:
1 2 4 5 8 10 16 20 32 37 40 74 80 148 160 185 296 370 592 740 1184 1480 2960 3613 5920 7226 14452 18065 28904 36130 57808 72260 115616 133681 144520 267362 289040 534724 578080 668405 1069448 1336810 2138896 2673620 4277792 5347240 10694480 21388960
Sum of all divisors σ(n): 51911496
Sum of proper divisors (its aliquot sum) s(n): 30522536
21388960 is an abundant number, because the sum of its proper divisors (30522536) is greater than itself. Its abundance is 9133576

Bases of 21388960

Binary: 1010001100101111010100000₂
Hexadecimal: 0x1465EA0
Base-36: CQFTS

Squares and roots of 21388960

21388960 squared (21388960²) is 457487609881600
21388960 cubed (21388960³) is 9785184188253147136000
The square root of 21388960 is 4624.8199964971
The cube root of 21388960 is 277.5853591261

Scales and comparisons

How big is 21388960?

21,388,960 seconds is equal to 35 weeks, 2 days, 13 hours, 22 minutes, 40 seconds.
To count from 1 to 21,388,960 would take you about eight 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 21388960 cubic inches would be around 23.1 feet tall.

Recreational maths with 21388960

21388960 backwards is 06988312
21388960 is a Harshad number.
The number of decimal digits it has is: 8
The sum of 21388960's digits is 37
More coming soon!

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The information we have on file for 21388960 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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