387

387 is an odd composite number composed of two prime numbers multiplied together.

What does the number 387 look like?

This visualization shows the relationship between its 2 prime factors (large circles) and 6 divisors.

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

Prime factorization of 387:

3² × 43

(3 × 3 × 43)

See below for interesting mathematical facts about the number 387 from the Numbermatics database.

Names of 387

Cardinal: 387 can be written as Three hundred eighty-seven.

Scientific notation

Scientific notation: 3.87 × 10²

Factors of 387

Number of distinct prime factors ω(n): 2
Total number of prime factors Ω(n): 3
Sum of prime factors: 46

Divisors of 387

Number of divisors d(n): 6
Complete list of divisors:
1 3 9 43 129 387
Sum of all divisors σ(n): 572
Sum of proper divisors (its aliquot sum) s(n): 185
387 is a deficient number, because the sum of its proper divisors (185) is less than itself. Its deficiency is 202

Bases of 387

Binary: 110000011₂
Hexadecimal: 0x183
Base-36: AR

Squares and roots of 387

387 squared (387²) is 149769
387 cubed (387³) is 57960603
The square root of 387 is 19.6723155729
The cube root of 387 is 7.2873616311

Scales and comparisons

How big is 387?

387 seconds is equal to 6 minutes, 27 seconds.
To count from 1 to 387 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 387 cubic inches would be around 0.6 feet tall.

Recreational maths with 387

387 backwards is 783
The number of decimal digits it has is: 3
The sum of 387's digits is 18
More coming soon!

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The information we have on file for 387 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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