21328

21,328 is an even composite number composed of three prime numbers multiplied together.

What does the number 21328 look like?

This visualization shows the relationship between its 3 prime factors (large circles) and 20 divisors.

21328 is an even composite number. It is composed of three distinct prime numbers multiplied together. It has a total of twenty divisors.

Prime factorization of 21328:

2⁴ × 31 × 43

(2 × 2 × 2 × 2 × 31 × 43)

See below for interesting mathematical facts about the number 21328 from the Numbermatics database.

Names of 21328

Cardinal: 21328 can be written as Twenty-one thousand, three hundred twenty-eight.

Scientific notation

Scientific notation: 2.1328 × 10⁴

Factors of 21328

Number of distinct prime factors ω(n): 3
Total number of prime factors Ω(n): 6
Sum of prime factors: 76

Divisors of 21328

Number of divisors d(n): 20
Complete list of divisors:
1 2 4 8 16 31 43 62 86 124 172 248 344 496 688 1333 2666 5332 10664 21328
Sum of all divisors σ(n): 43648
Sum of proper divisors (its aliquot sum) s(n): 22320
21328 is an abundant number, because the sum of its proper divisors (22320) is greater than itself. Its abundance is 992

Bases of 21328

Binary: 101001101010000₂
Hexadecimal: 0x5350
Base-36: GGG

Squares and roots of 21328

21328 squared (21328²) is 454883584
21328 cubed (21328³) is 9701757079552
The square root of 21328 is 146.0410901083
The cube root of 21328 is 27.7321395771

Scales and comparisons

How big is 21328?

21,328 seconds is equal to 5 hours, 55 minutes, 28 seconds.
To count from 1 to 21,328 would take you about five 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 21328 cubic inches would be around 2.3 feet tall.

Recreational maths with 21328

21328 backwards is 82312
21328 is a Harshad number.
The number of decimal digits it has is: 5
The sum of 21328's digits is 16
More coming soon!

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The information we have on file for 21328 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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