# 2640

## 2,640 is an even composite number composed of four prime numbers multiplied together.

What does the number 2640 look like?

This visualization shows the relationship between its 4 prime factors (large circles) and 40 divisors.

2640 is an even composite number. It is composed of four distinct prime numbers multiplied together. It has a total of forty divisors.

## Prime factorization of 2640:

### 24 × 3 × 5 × 11

(2 × 2 × 2 × 2 × 3 × 5 × 11)

See below for interesting mathematical facts about the number 2640 from the Numbermatics database.

### Names of 2640

• Cardinal: 2640 can be written as Two thousand, six hundred forty.

### Scientific notation

• Scientific notation: 2.64 × 103

### Factors of 2640

• Number of distinct prime factors ω(n): 4
• Total number of prime factors Ω(n): 7
• Sum of prime factors: 21

### Divisors of 2640

• Number of divisors d(n): 40
• Complete list of divisors:
• Sum of all divisors σ(n): 8928
• Sum of proper divisors (its aliquot sum) s(n): 6288
• 2640 is an abundant number, because the sum of its proper divisors (6288) is greater than itself. Its abundance is 3648

### Bases of 2640

• Binary: 1010010100002
• Base-36: 21C

### Squares and roots of 2640

• 2640 squared (26402) is 6969600
• 2640 cubed (26403) is 18399744000
• The square root of 2640 is 51.3809303147
• The cube root of 2640 is 13.8208464601

### Scales and comparisons

How big is 2640?
• 2,640 seconds is equal to 44 minutes.
• To count from 1 to 2,640 would take you about forty-four 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 2640 cubic inches would be around 1.2 feet tall.

### Recreational maths with 2640

• 2640 backwards is 0462
• 2640 is a Harshad number.
• The number of decimal digits it has is: 4
• The sum of 2640's digits is 12
• More coming soon!