# 2780

## 2,780 is an even composite number composed of three prime numbers multiplied together.

What does the number 2780 look like?

This visualization shows the relationship between its 3 prime factors (large circles) and 12 divisors.

2780 is an even composite number. It is composed of three distinct prime numbers multiplied together. It has a total of twelve divisors.

## Prime factorization of 2780:

### 22 × 5 × 139

(2 × 2 × 5 × 139)

See below for interesting mathematical facts about the number 2780 from the Numbermatics database.

### Names of 2780

• Cardinal: 2780 can be written as Two thousand, seven hundred eighty.

### Scientific notation

• Scientific notation: 2.78 × 103

### Factors of 2780

• Number of distinct prime factors ω(n): 3
• Total number of prime factors Ω(n): 4
• Sum of prime factors: 146

### Divisors of 2780

• Number of divisors d(n): 12
• Complete list of divisors:
• Sum of all divisors σ(n): 5880
• Sum of proper divisors (its aliquot sum) s(n): 3100
• 2780 is an abundant number, because the sum of its proper divisors (3100) is greater than itself. Its abundance is 320

### Bases of 2780

• Binary: 1010110111002
• Base-36: 258

### Squares and roots of 2780

• 2780 squared (27802) is 7728400
• 2780 cubed (27803) is 21484952000
• The square root of 2780 is 52.7257053059
• The cube root of 2780 is 14.0609586789

### Scales and comparisons

How big is 2780?
• 2,780 seconds is equal to 46 minutes, 20 seconds.
• To count from 1 to 2,780 would take you about forty-six 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 2780 cubic inches would be around 1.2 feet tall.

### Recreational maths with 2780

• 2780 backwards is 0872
• The number of decimal digits it has is: 4
• The sum of 2780's digits is 17
• More coming soon!