# 218409

## 218,409 is an odd composite number composed of three prime numbers multiplied together.

What does the number 218409 look like?

This visualization shows the relationship between its 3 prime factors (large circles) and 8 divisors.

218409 is an odd composite number. It is composed of three distinct prime numbers multiplied together. It has a total of eight divisors.

## Prime factorization of 218409:

### 3 × 47 × 1549

See below for interesting mathematical facts about the number 218409 from the Numbermatics database.

### Names of 218409

• Cardinal: 218409 can be written as Two hundred eighteen thousand, four hundred nine.

### Scientific notation

• Scientific notation: 2.18409 × 105

### Factors of 218409

• Number of distinct prime factors ω(n): 3
• Total number of prime factors Ω(n): 3
• Sum of prime factors: 1599

### Divisors of 218409

• Number of divisors d(n): 8
• Complete list of divisors:
• Sum of all divisors σ(n): 297600
• Sum of proper divisors (its aliquot sum) s(n): 79191
• 218409 is a deficient number, because the sum of its proper divisors (79191) is less than itself. Its deficiency is 139218

### Bases of 218409

• Binary: 1101010101001010012
• Base-36: 4OIX

### Squares and roots of 218409

• 218409 squared (2184092) is 47702491281
• 218409 cubed (2184093) is 10418653418191929
• The square root of 218409 is 467.3424868337
• The cube root of 218409 is 60.2222314259

### Scales and comparisons

How big is 218409?
• 218,409 seconds is equal to 2 days, 12 hours, 40 minutes, 9 seconds.
• To count from 1 to 218,409 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 218409 cubic inches would be around 5 feet tall.

### Recreational maths with 218409

• 218409 backwards is 904812
• The number of decimal digits it has is: 6
• The sum of 218409's digits is 24
• More coming soon!