18409

18,409 is an odd composite number composed of two prime numbers multiplied together.

What does the number 18409 look like?

This visualization shows the relationship between its 2 prime factors (large circles) and 4 divisors.

18409 is an odd composite number. It is composed of two distinct prime numbers multiplied together. It has a total of four divisors.

Prime factorization of 18409:

41 × 449

See below for interesting mathematical facts about the number 18409 from the Numbermatics database.


Names of 18409

  • Cardinal: 18409 can be written as Eighteen thousand, four hundred nine.

Scientific notation

  • Scientific notation: 1.8409 × 104

Factors of 18409

  • Number of distinct prime factors ω(n): 2
  • Total number of prime factors Ω(n): 2
  • Sum of prime factors: 490

Divisors of 18409

  • Number of divisors d(n): 4
  • Complete list of divisors:
  • Sum of all divisors σ(n): 18900
  • Sum of proper divisors (its aliquot sum) s(n): 491
  • 18409 is a deficient number, because the sum of its proper divisors (491) is less than itself. Its deficiency is 17918

Bases of 18409

  • Binary: 1000111111010012
  • Hexadecimal: 0x47E9
  • Base-36: E7D

Squares and roots of 18409

  • 18409 squared (184092) is 338891281
  • 18409 cubed (184093) is 6238649591929
  • The square root of 18409 is 135.6797700471
  • The cube root of 18409 is 26.4044261021

Scales and comparisons

How big is 18409?
  • 18,409 seconds is equal to 5 hours, 6 minutes, 49 seconds.
  • To count from 1 to 18,409 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 18409 cubic inches would be around 2.2 feet tall.

Recreational maths with 18409

  • 18409 backwards is 90481
  • The number of decimal digits it has is: 5
  • The sum of 18409's digits is 22
  • More coming soon!

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"Number 18409 - Facts about the integer". Numbermatics.com. 2020. Web. 5 July 2020.

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The information we have on file for 18409 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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