# 80640

## 80,640 is an even composite number composed of four prime numbers multiplied together.

What does the number 80640 look like?

This visualization shows the relationship between its 4 prime factors (large circles) and 108 divisors.

80640 is an even composite number. It is composed of four distinct prime numbers multiplied together. It has a total of one hundred eight divisors.

## Prime factorization of 80640:

### 28 × 32 × 5 × 7

(2 × 2 × 2 × 2 × 2 × 2 × 2 × 2 × 3 × 3 × 5 × 7)

See below for interesting mathematical facts about the number 80640 from the Numbermatics database.

### Names of 80640

• Cardinal: 80640 can be written as Eighty thousand, six hundred forty.

### Scientific notation

• Scientific notation: 8.064 × 104

### Factors of 80640

• Number of distinct prime factors ω(n): 4
• Total number of prime factors Ω(n): 12
• Sum of prime factors: 17

### Divisors of 80640

• Number of divisors d(n): 108
• Complete list of divisors:
• Sum of all divisors σ(n): 318864
• Sum of proper divisors (its aliquot sum) s(n): 238224
• 80640 is an abundant number, because the sum of its proper divisors (238224) is greater than itself. Its abundance is 157584

### Bases of 80640

• Binary: 100111011000000002
• Base-36: 1Q80

### Squares and roots of 80640

• 80640 squared (806402) is 6502809600
• 80640 cubed (806403) is 524386566144000
• The square root of 80640 is 283.9718295887
• The cube root of 80640 is 43.2032919305

### Scales and comparisons

How big is 80640?
• 80,640 seconds is equal to 22 hours, 24 minutes.
• To count from 1 to 80,640 would take you about twenty-two hours.

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 80640 cubic inches would be around 3.6 feet tall.

### Recreational maths with 80640

• 80640 backwards is 04608
• 80640 is a Harshad number.
• The number of decimal digits it has is: 5
• The sum of 80640's digits is 18
• More coming soon!