# 818

## 818 is an even composite number composed of two prime numbers multiplied together.

What does the number 818 look like?

This visualization shows the relationship between its 2 prime factors (large circles) and 4 divisors.

818 is an even composite number. It is composed of two distinct prime numbers multiplied together. It has a total of four divisors.

## Prime factorization of 818:

### 2 × 409

See below for interesting mathematical facts about the number 818 from the Numbermatics database.

### Names of 818

• Cardinal: 818 can be written as Eight hundred eighteen.

### Scientific notation

• Scientific notation: 8.18 × 102

### Factors of 818

• Number of distinct prime factors ω(n): 2
• Total number of prime factors Ω(n): 2
• Sum of prime factors: 411

### Divisors of 818

• Number of divisors d(n): 4
• Complete list of divisors:
• Sum of all divisors σ(n): 1230
• Sum of proper divisors (its aliquot sum) s(n): 412
• 818 is a deficient number, because the sum of its proper divisors (412) is less than itself. Its deficiency is 406

### Bases of 818

• Binary: 11001100102
• Base-36: MQ

### Squares and roots of 818

• 818 squared (8182) is 669124
• 818 cubed (8183) is 547343432
• The square root of 818 is 28.6006992921
• The cube root of 818 is 9.3522857517

### Scales and comparisons

How big is 818?
• 818 seconds is equal to 13 minutes, 38 seconds.
• To count from 1 to 818 would take you about 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 818 cubic inches would be around 0.8 feet tall.

### Recreational maths with 818

• 818 is the same when its digits are reversed! That makes it a palindromic number.
• The number of decimal digits it has is: 3
• The sum of 818's digits is 17
• More coming soon!