21450728

21,450,728 is an even composite number composed of four prime numbers multiplied together.

What does the number 21450728 look like?

This visualization shows the relationship between its 4 prime factors (large circles) and 32 divisors.

21450728 is an even composite number. It is composed of four distinct prime numbers multiplied together. It has a total of thirty-two divisors.

Prime factorization of 21450728:

2³ × 13 × 239 × 863

(2 × 2 × 2 × 13 × 239 × 863)

See below for interesting mathematical facts about the number 21450728 from the Numbermatics database.

Names of 21450728

Cardinal: 21450728 can be written as Twenty-one million, four hundred fifty thousand, seven hundred twenty-eight.

Scientific notation

Scientific notation: 2.1450728 × 10⁷

Factors of 21450728

Number of distinct prime factors ω(n): 4
Total number of prime factors Ω(n): 6
Sum of prime factors: 1117

Divisors of 21450728

Number of divisors d(n): 32
Complete list of divisors:
1 2 4 8 13 26 52 104 239 478 863 956 1726 1912 3107 3452 6214 6904 11219 12428 22438 24856 44876 89752 206257 412514 825028 1650056 2681341 5362682 10725364 21450728
Sum of all divisors σ(n): 43545600
Sum of proper divisors (its aliquot sum) s(n): 22094872
21450728 is an abundant number, because the sum of its proper divisors (22094872) is greater than itself. Its abundance is 644144

Bases of 21450728

Binary: 1010001110100111111101000₂
Hexadecimal: 0x1474FE8
Base-36: CRRHK

Squares and roots of 21450728

21450728 squared (21450728²) is 460133731729984
21450728 cubed (21450728³) is 9870203522964856228352
The square root of 21450728 is 4631.4930637971
The cube root of 21450728 is 277.8523101451

Scales and comparisons

How big is 21450728?

21,450,728 seconds is equal to 35 weeks, 3 days, 6 hours, 32 minutes, 8 seconds.
To count from 1 to 21,450,728 would take you about nine 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 21450728 cubic inches would be around 23.2 feet tall.

Recreational maths with 21450728

21450728 backwards is 82705412
The number of decimal digits it has is: 8
The sum of 21450728's digits is 29
More coming soon!

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The information we have on file for 21450728 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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