21128

21,128 is an even composite number composed of three prime numbers multiplied together.

What does the number 21128 look like?

This visualization shows the relationship between its 3 prime factors (large circles) and 16 divisors.

21128 is an even composite number. It is composed of three distinct prime numbers multiplied together. It has a total of sixteen divisors.

Prime factorization of 21128:

2³ × 19 × 139

(2 × 2 × 2 × 19 × 139)

See below for interesting mathematical facts about the number 21128 from the Numbermatics database.

Names of 21128

Cardinal: 21128 can be written as Twenty-one thousand, one hundred twenty-eight.

Scientific notation

Scientific notation: 2.1128 × 10⁴

Factors of 21128

Number of distinct prime factors ω(n): 3
Total number of prime factors Ω(n): 5
Sum of prime factors: 160

Divisors of 21128

Number of divisors d(n): 16
Complete list of divisors:
1 2 4 8 19 38 76 139 152 278 556 1112 2641 5282 10564 21128
Sum of all divisors σ(n): 42000
Sum of proper divisors (its aliquot sum) s(n): 20872
21128 is a deficient number, because the sum of its proper divisors (20872) is less than itself. Its deficiency is 256

Bases of 21128

Binary: 101001010001000₂
Hexadecimal: 0x5288
Base-36: GAW

Squares and roots of 21128

21128 squared (21128²) is 446392384
21128 cubed (21128³) is 9431378289152
The square root of 21128 is 145.3547384849
The cube root of 21128 is 27.6451825923

Scales and comparisons

How big is 21128?

21,128 seconds is equal to 5 hours, 52 minutes, 8 seconds.
To count from 1 to 21,128 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 21128 cubic inches would be around 2.3 feet tall.

Recreational maths with 21128

21128 backwards is 82112
The number of decimal digits it has is: 5
The sum of 21128's digits is 14
More coming soon!

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The information we have on file for 21128 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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