# 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:
• 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
• 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!