# 1640

## 1,640 is an even composite number composed of three prime numbers multiplied together.

What does the number 1640 look like?

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

1640 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 1640:

### 23 × 5 × 41

(2 × 2 × 2 × 5 × 41)

See below for interesting mathematical facts about the number 1640 from the Numbermatics database.

### Names of 1640

• Cardinal: 1640 can be written as One thousand, six hundred forty.

### Scientific notation

• Scientific notation: 1.64 × 103

### Factors of 1640

• Number of distinct prime factors ω(n): 3
• Total number of prime factors Ω(n): 5
• Sum of prime factors: 48

### Divisors of 1640

• Number of divisors d(n): 16
• Complete list of divisors:
• Sum of all divisors σ(n): 3780
• Sum of proper divisors (its aliquot sum) s(n): 2140
• 1640 is an abundant number, because the sum of its proper divisors (2140) is greater than itself. Its abundance is 500

### Bases of 1640

• Binary: 110011010002
• Base-36: 19K

### Squares and roots of 1640

• 1640 squared (16402) is 2689600
• 1640 cubed (16403) is 4410944000
• The square root of 1640 is 40.4969134623
• The cube root of 1640 is 11.7927370801

### Scales and comparisons

How big is 1640?
• 1,640 seconds is equal to 27 minutes, 20 seconds.
• To count from 1 to 1,640 would take you about twenty-seven 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 1640 cubic inches would be around 1 feet tall.

### Recreational maths with 1640

• 1640 backwards is 0461
• The number of decimal digits it has is: 4
• The sum of 1640's digits is 11
• More coming soon!