# 1240

## 1,240 is an even composite number composed of three prime numbers multiplied together.

What does the number 1240 look like?

This visualization shows the relationship between its 3 prime factors (large circles) and 16 divisors.

1240 is an even composite number. It is composed of three distinct prime numbers multiplied together. It has a total of sixteen divisors.

## Prime factorization of 1240:

### 23 × 5 × 31

(2 × 2 × 2 × 5 × 31)

See below for interesting mathematical facts about the number 1240 from the Numbermatics database.

### Names of 1240

• Cardinal: 1240 can be written as One thousand, two hundred forty.

### Scientific notation

• Scientific notation: 1.24 × 103

### Factors of 1240

• Number of distinct prime factors ω(n): 3
• Total number of prime factors Ω(n): 5
• Sum of prime factors: 38

### Divisors of 1240

• Number of divisors d(n): 16
• Complete list of divisors:
• Sum of all divisors σ(n): 2880
• Sum of proper divisors (its aliquot sum) s(n): 1640
• 1240 is an abundant number, because the sum of its proper divisors (1640) is greater than itself. Its abundance is 400

### Bases of 1240

• Binary: 100110110002
• Base-36: YG

### Squares and roots of 1240

• 1240 squared (12402) is 1537600
• 1240 cubed (12403) is 1906624000
• The square root of 1240 is 35.2136337233
• The cube root of 1240 is 10.7433707099

### Scales and comparisons

How big is 1240?
• 1,240 seconds is equal to 20 minutes, 40 seconds.
• To count from 1 to 1,240 would take you about twenty 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 1240 cubic inches would be around 0.9 feet tall.

### Recreational maths with 1240

• 1240 backwards is 0421
• The number of decimal digits it has is: 4
• The sum of 1240's digits is 7
• More coming soon!