# 81408

## 81,408 is an even composite number composed of three prime numbers multiplied together.

What does the number 81408 look like?

This visualization shows the relationship between its 3 prime factors (large circles) and 40 divisors.

81408 is an even composite number. It is composed of three distinct prime numbers multiplied together. It has a total of forty divisors.

## Prime factorization of 81408:

### 29 × 3 × 53

(2 × 2 × 2 × 2 × 2 × 2 × 2 × 2 × 2 × 3 × 53)

See below for interesting mathematical facts about the number 81408 from the Numbermatics database.

### Names of 81408

• Cardinal: 81408 can be written as Eighty-one thousand, four hundred eight.

### Scientific notation

• Scientific notation: 8.1408 × 104

### Factors of 81408

• Number of distinct prime factors ω(n): 3
• Total number of prime factors Ω(n): 11
• Sum of prime factors: 58

### Divisors of 81408

• Number of divisors d(n): 40
• Complete list of divisors:
• Sum of all divisors σ(n): 220968
• Sum of proper divisors (its aliquot sum) s(n): 139560
• 81408 is an abundant number, because the sum of its proper divisors (139560) is greater than itself. Its abundance is 58152

### Bases of 81408

• Binary: 100111110000000002
• Base-36: 1QTC

### Squares and roots of 81408

• 81408 squared (814082) is 6627262464
• 81408 cubed (814083) is 539512182669312
• The square root of 81408 is 285.3208720021
• The cube root of 81408 is 43.3400121199

### Scales and comparisons

How big is 81408?
• 81,408 seconds is equal to 22 hours, 36 minutes, 48 seconds.
• To count from 1 to 81,408 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 81408 cubic inches would be around 3.6 feet tall.

### Recreational maths with 81408

• 81408 backwards is 80418
• The number of decimal digits it has is: 5
• The sum of 81408's digits is 21
• More coming soon!