# 81620

## 81,620 is an even composite number composed of five prime numbers multiplied together.

What does the number 81620 look like?

This visualization shows the relationship between its 5 prime factors (large circles) and 48 divisors.

81620 is an even composite number. It is composed of five distinct prime numbers multiplied together. It has a total of forty-eight divisors.

## Prime factorization of 81620:

### 22 × 5 × 7 × 11 × 53

(2 × 2 × 5 × 7 × 11 × 53)

See below for interesting mathematical facts about the number 81620 from the Numbermatics database.

### Names of 81620

• Cardinal: 81620 can be written as Eighty-one thousand, six hundred twenty.

### Scientific notation

• Scientific notation: 8.162 × 104

### Factors of 81620

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 6
• Sum of prime factors: 78

### Divisors of 81620

• Number of divisors d(n): 48
• Complete list of divisors:
• Sum of all divisors σ(n): 217728
• Sum of proper divisors (its aliquot sum) s(n): 136108
• 81620 is an abundant number, because the sum of its proper divisors (136108) is greater than itself. Its abundance is 54488

### Bases of 81620

• Binary: 100111110110101002
• Base-36: 1QZ8

### Squares and roots of 81620

• 81620 squared (816202) is 6661824400
• 81620 cubed (816203) is 543738107528000
• The square root of 81620 is 285.6921419991
• The cube root of 81620 is 43.3776010477

### Scales and comparisons

How big is 81620?
• 81,620 seconds is equal to 22 hours, 40 minutes, 20 seconds.
• To count from 1 to 81,620 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 81620 cubic inches would be around 3.6 feet tall.

### Recreational maths with 81620

• 81620 backwards is 02618
• The number of decimal digits it has is: 5
• The sum of 81620's digits is 17
• More coming soon!