# 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
• 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!