# 218408

## 218,408 is an even composite number composed of three prime numbers multiplied together.

What does the number 218408 look like?

This visualization shows the relationship between its 3 prime factors (large circles) and 16 divisors.

218408 is an even composite number. It is composed of three distinct prime numbers multiplied together. It has a total of sixteen divisors.

## Prime factorization of 218408:

### 23 × 23 × 1187

(2 × 2 × 2 × 23 × 1187)

See below for interesting mathematical facts about the number 218408 from the Numbermatics database.

### Names of 218408

• Cardinal: 218408 can be written as Two hundred eighteen thousand, four hundred eight.

### Scientific notation

• Scientific notation: 2.18408 × 105

### Factors of 218408

• Number of distinct prime factors ω(n): 3
• Total number of prime factors Ω(n): 5
• Sum of prime factors: 1212

### Divisors of 218408

• Number of divisors d(n): 16
• Complete list of divisors:
• Sum of all divisors σ(n): 427680
• Sum of proper divisors (its aliquot sum) s(n): 209272
• 218408 is a deficient number, because the sum of its proper divisors (209272) is less than itself. Its deficiency is 9136

### Bases of 218408

• Binary: 1101010101001010002
• Base-36: 4OIW

### Squares and roots of 218408

• 218408 squared (2184082) is 47702054464
• 218408 cubed (2184083) is 10418510311373312
• The square root of 218408 is 467.3414169533
• The cube root of 218408 is 60.2221395153

### Scales and comparisons

How big is 218408?
• 218,408 seconds is equal to 2 days, 12 hours, 40 minutes, 8 seconds.
• To count from 1 to 218,408 would take you about two days.

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 218408 cubic inches would be around 5 feet tall.

### Recreational maths with 218408

• 218408 backwards is 804812
• 218408 is a Harshad number.
• The number of decimal digits it has is: 6
• The sum of 218408's digits is 23
• More coming soon!