# 81140

## 81,140 is an even composite number composed of three prime numbers multiplied together.

What does the number 81140 look like?

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

81140 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 81140:

### 22 × 5 × 4057

(2 × 2 × 5 × 4057)

See below for interesting mathematical facts about the number 81140 from the Numbermatics database.

### Names of 81140

• Cardinal: 81140 can be written as Eighty-one thousand, one hundred forty.

### Scientific notation

• Scientific notation: 8.114 × 104

### Factors of 81140

• Number of distinct prime factors ω(n): 3
• Total number of prime factors Ω(n): 4
• Sum of prime factors: 4064

### Divisors of 81140

• Number of divisors d(n): 12
• Complete list of divisors:
• Sum of all divisors σ(n): 170436
• Sum of proper divisors (its aliquot sum) s(n): 89296
• 81140 is an abundant number, because the sum of its proper divisors (89296) is greater than itself. Its abundance is 8156

### Bases of 81140

• Binary: 100111100111101002
• Base-36: 1QLW

### Squares and roots of 81140

• 81140 squared (811402) is 6583699600
• 81140 cubed (811403) is 534201385544000
• The square root of 81140 is 284.8508381593
• The cube root of 81140 is 43.2924005317

### Scales and comparisons

How big is 81140?
• 81,140 seconds is equal to 22 hours, 32 minutes, 20 seconds.
• To count from 1 to 81,140 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 81140 cubic inches would be around 3.6 feet tall.

### Recreational maths with 81140

• 81140 backwards is 04118
• The number of decimal digits it has is: 5
• The sum of 81140's digits is 14
• More coming soon!