# 345

## 345 is an odd composite number composed of three prime numbers multiplied together.

What does the number 345 look like?

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

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

## Prime factorization of 345:

### 3 × 5 × 23

See below for interesting mathematical facts about the number 345 from the Numbermatics database.

### Names of 345

• Cardinal: 345 can be written as Three hundred forty-five.

### Scientific notation

• Scientific notation: 3.45 × 102

### Factors of 345

• Number of distinct prime factors ω(n): 3
• Total number of prime factors Ω(n): 3
• Sum of prime factors: 31

### Divisors of 345

• Number of divisors d(n): 8
• Complete list of divisors:
• Sum of all divisors σ(n): 576
• Sum of proper divisors (its aliquot sum) s(n): 231
• 345 is a deficient number, because the sum of its proper divisors (231) is less than itself. Its deficiency is 114

### Bases of 345

• Binary: 1010110012
• Base-36: 9L

### Squares and roots of 345

• 345 squared (3452) is 119025
• 345 cubed (3453) is 41063625
• The square root of 345 is 18.5741756211
• The cube root of 345 is 7.0135790835

### Scales and comparisons

How big is 345?
• 345 seconds is equal to 5 minutes, 45 seconds.
• To count from 1 to 345 would take you about two 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 345 cubic inches would be around 0.6 feet tall.

### Recreational maths with 345

• 345 backwards is 543
• The number of decimal digits it has is: 3
• The sum of 345's digits is 12
• More coming soon!