# 765

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

What does the number 765 look like?

This visualization shows the relationship between its 3 prime factors (large circles) and 12 divisors.

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

## Prime factorization of 765:

### 32 × 5 × 17

(3 × 3 × 5 × 17)

See below for interesting mathematical facts about the number 765 from the Numbermatics database.

### Names of 765

• Cardinal: 765 can be written as Seven hundred sixty-five.

### Scientific notation

• Scientific notation: 7.65 × 102

### Factors of 765

• Number of distinct prime factors ω(n): 3
• Total number of prime factors Ω(n): 4
• Sum of prime factors: 25

### Divisors of 765

• Number of divisors d(n): 12
• Complete list of divisors:
• Sum of all divisors σ(n): 1404
• Sum of proper divisors (its aliquot sum) s(n): 639
• 765 is a deficient number, because the sum of its proper divisors (639) is less than itself. Its deficiency is 126

### Bases of 765

• Binary: 10111111012
• Base-36: L9

### Squares and roots of 765

• 765 squared (7652) is 585225
• 765 cubed (7653) is 447697125
• The square root of 765 is 27.6586333717
• The cube root of 765 is 9.1457742737

### Scales and comparisons

How big is 765?
• 765 seconds is equal to 12 minutes, 45 seconds.
• To count from 1 to 765 would take you about six 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 765 cubic inches would be around 0.8 feet tall.

### Recreational maths with 765

• 765 backwards is 567
• The number of decimal digits it has is: 3
• The sum of 765's digits is 18
• More coming soon!