# 690

## 690 is an even composite number composed of four prime numbers multiplied together.

What does the number 690 look like?

This visualization shows the relationship between its 4 prime factors (large circles) and 16 divisors.

690 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 690:

### 2 × 3 × 5 × 23

See below for interesting mathematical facts about the number 690 from the Numbermatics database.

### Names of 690

• Cardinal: 690 can be written as Six hundred ninety.

### Scientific notation

• Scientific notation: 6.9 × 102

### Factors of 690

• Number of distinct prime factors ω(n): 4
• Total number of prime factors Ω(n): 4
• Sum of prime factors: 33

### Divisors of 690

• Number of divisors d(n): 16
• Complete list of divisors:
• Sum of all divisors σ(n): 1728
• Sum of proper divisors (its aliquot sum) s(n): 1038
• 690 is an abundant number, because the sum of its proper divisors (1038) is greater than itself. Its abundance is 348

### Bases of 690

• Binary: 10101100102
• Base-36: J6

### Squares and roots of 690

• 690 squared (6902) is 476100
• 690 cubed (6903) is 328509000
• The square root of 690 is 26.2678510731
• The cube root of 690 is 8.8365559225

### Scales and comparisons

How big is 690?
• 690 seconds is equal to 11 minutes, 30 seconds.
• To count from 1 to 690 would take you about five 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 690 cubic inches would be around 0.7 feet tall.

### Recreational maths with 690

• 690 backwards is 096
• 690 is a Harshad number.
• The number of decimal digits it has is: 3
• The sum of 690's digits is 15
• More coming soon!