21284

21,284 is an even composite number composed of three prime numbers multiplied together.

What does the number 21284 look like?

This visualization shows the relationship between its 3 prime factors (large circles) and 12 divisors.

21284 is an even composite number. It is composed of three distinct prime numbers multiplied together. It has a total of twelve divisors.

Prime factorization of 21284:

22 × 17 × 313

(2 × 2 × 17 × 313)

See below for interesting mathematical facts about the number 21284 from the Numbermatics database.


Names of 21284

  • Cardinal: 21284 can be written as Twenty-one thousand, two hundred eighty-four.

Scientific notation

  • Scientific notation: 2.1284 × 104

Factors of 21284

  • Number of distinct prime factors ω(n): 3
  • Total number of prime factors Ω(n): 4
  • Sum of prime factors: 332

Divisors of 21284

  • Number of divisors d(n): 12
  • Complete list of divisors:
  • Sum of all divisors σ(n): 39564
  • Sum of proper divisors (its aliquot sum) s(n): 18280
  • 21284 is a deficient number, because the sum of its proper divisors (18280) is less than itself. Its deficiency is 3004

Bases of 21284

  • Binary: 1010011001001002
  • Hexadecimal: 0x5324
  • Base-36: GF8

Squares and roots of 21284

  • 21284 squared (212842) is 453008656
  • 21284 cubed (212843) is 9641836234304
  • The square root of 21284 is 145.8903697985
  • The cube root of 21284 is 27.7130558339

Scales and comparisons

How big is 21284?
  • 21,284 seconds is equal to 5 hours, 54 minutes, 44 seconds.
  • To count from 1 to 21,284 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 21284 cubic inches would be around 2.3 feet tall.

Recreational maths with 21284

  • 21284 backwards is 48212
  • 21284 is a Harshad number.
  • The number of decimal digits it has is: 5
  • The sum of 21284's digits is 17
  • More coming soon!

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"Number 21284 - Facts about the integer". Numbermatics.com. 2024. Web. 29 March 2024.

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The information we have on file for 21284 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!

Keywords: Divisors of 21284, math, Factors of 21284, curriculum, school, college, exams, university, Prime factorization of 21284, STEM, science, technology, engineering, physics, economics, calculator, twenty-one thousand, two hundred eighty-four.

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