390

390 is an even composite number composed of four prime numbers multiplied together.

What does the number 390 look like?

This visualization shows the relationship between its 4 prime factors (large circles) and 16 divisors.

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

Prime factorization of 390:

2 × 3 × 5 × 13

See below for interesting mathematical facts about the number 390 from the Numbermatics database.


Names of 390

  • Cardinal: 390 can be written as Three hundred ninety.

Scientific notation

  • Scientific notation: 3.9 × 102

Factors of 390

  • Number of distinct prime factors ω(n): 4
  • Total number of prime factors Ω(n): 4
  • Sum of prime factors: 23

Divisors of 390

  • Number of divisors d(n): 16
  • Complete list of divisors:
  • Sum of all divisors σ(n): 1008
  • Sum of proper divisors (its aliquot sum) s(n): 618
  • 390 is an abundant number, because the sum of its proper divisors (618) is greater than itself. Its abundance is 228

Bases of 390

  • Binary: 1100001102
  • Hexadecimal: 0x186
  • Base-36: AU

Squares and roots of 390

  • 390 squared (3902) is 152100
  • 390 cubed (3903) is 59319000
  • The square root of 390 is 19.7484176581
  • The cube root of 390 is 7.3061435743

Scales and comparisons

How big is 390?
  • 390 seconds is equal to 6 minutes, 30 seconds.
  • To count from 1 to 390 would take you about three 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 390 cubic inches would be around 0.6 feet tall.

Recreational maths with 390

  • 390 backwards is 093
  • The number of decimal digits it has is: 3
  • The sum of 390's digits is 12
  • More coming soon!

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The information we have on file for 390 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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