21280

21,280 is an even composite number composed of four prime numbers multiplied together.

What does the number 21280 look like?

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

21280 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 21280:

25 × 5 × 7 × 19

(2 × 2 × 2 × 2 × 2 × 5 × 7 × 19)

See below for interesting mathematical facts about the number 21280 from the Numbermatics database.


Names of 21280

  • Cardinal: 21280 can be written as Twenty-one thousand, two hundred eighty.

Scientific notation

  • Scientific notation: 2.128 × 104

Factors of 21280

  • Number of distinct prime factors ω(n): 4
  • Total number of prime factors Ω(n): 8
  • Sum of prime factors: 33

Divisors of 21280

Bases of 21280

  • Binary: 1010011001000002
  • Hexadecimal: 0x5320
  • Base-36: GF4

Squares and roots of 21280

  • 21280 squared (212802) is 452838400
  • 21280 cubed (212803) is 9636401152000
  • The square root of 21280 is 145.8766602305
  • The cube root of 21280 is 27.7113196447

Scales and comparisons

How big is 21280?
  • 21,280 seconds is equal to 5 hours, 54 minutes, 40 seconds.
  • To count from 1 to 21,280 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 21280 cubic inches would be around 2.3 feet tall.

Recreational maths with 21280

  • 21280 backwards is 08212
  • The number of decimal digits it has is: 5
  • The sum of 21280's digits is 13
  • More coming soon!

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The information we have on file for 21280 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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