642

642 is an even composite number composed of three prime numbers multiplied together.

What does the number 642 look like?

This visualization shows the relationship between its 3 prime factors (large circles) and 8 divisors.

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

Prime factorization of 642:

2 × 3 × 107

See below for interesting mathematical facts about the number 642 from the Numbermatics database.

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Names Factors Divisors Scales Roots Fun

Names of 642

  • Cardinal: 642 can be written as Six hundred forty-two.

Scientific notation

  • Scientific notation: 6.42 × 102

Factors of 642

  • Number of distinct prime factors ω(n): 3
  • Total number of prime factors Ω(n): 3
  • Sum of prime factors: 112

Divisors of 642

  • Number of divisors d(n): 8
  • Complete list of divisors:
  • Sum of all divisors σ(n): 1296
  • Sum of proper divisors (its aliquot sum) s(n): 654
  • 642 is an abundant number, because the sum of its proper divisors (654) is greater than itself. Its abundance is 12

Bases of 642

  • Binary: 10100000102
  • Hexadecimal: 0x282
  • Base-36: HU

Squares and roots of 642

  • 642 squared (6422) is 412164
  • 642 cubed (6423) is 264609288
  • The square root of 642 is 25.3377189185
  • The cube root of 642 is 8.6267062367

Scales and comparisons

How big is 642?
  • 642 seconds is equal to 10 minutes, 42 seconds.
  • To count from 1 to 642 would take you about five minutes.

    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 642 cubic inches would be around 0.7 feet tall.

Recreational maths with 642

  • 642 backwards is 246
  • The number of decimal digits it has is: 3
  • The sum of 642's digits is 12
  • More coming soon!

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"Number 642 - Facts about the integer". Numbermatics.com. 2019. Web. 12 November 2019.

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The information we have on file for 642 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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