# 1840

## 1,840 is an even composite number composed of three prime numbers multiplied together.

What does the number 1840 look like?

This visualization shows the relationship between its 3 prime factors (large circles) and 20 divisors.

1840 is an even composite number. It is composed of three distinct prime numbers multiplied together. It has a total of twenty divisors.

## Prime factorization of 1840:

### 24 × 5 × 23

(2 × 2 × 2 × 2 × 5 × 23)

See below for interesting mathematical facts about the number 1840 from the Numbermatics database.

### Names of 1840

• Cardinal: 1840 can be written as One thousand, eight hundred forty.

### Scientific notation

• Scientific notation: 1.84 × 103

### Factors of 1840

• Number of distinct prime factors ω(n): 3
• Total number of prime factors Ω(n): 6
• Sum of prime factors: 30

### Divisors of 1840

• Number of divisors d(n): 20
• Complete list of divisors:
• Sum of all divisors σ(n): 4464
• Sum of proper divisors (its aliquot sum) s(n): 2624
• 1840 is an abundant number, because the sum of its proper divisors (2624) is greater than itself. Its abundance is 784

### Bases of 1840

• Binary: 111001100002
• Base-36: 1F4

### Squares and roots of 1840

• 1840 squared (18402) is 3385600
• 1840 cubed (18403) is 6229504000
• The square root of 1840 is 42.8952211791
• The cube root of 1840 is 12.2538513505

### Scales and comparisons

How big is 1840?
• 1,840 seconds is equal to 30 minutes, 40 seconds.
• To count from 1 to 1,840 would take you about thirty 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 1840 cubic inches would be around 1 feet tall.

### Recreational maths with 1840

• 1840 backwards is 0481
• The number of decimal digits it has is: 4
• The sum of 1840's digits is 13
• More coming soon!