# 18409

## 18,409 is an odd composite number composed of two prime numbers multiplied together.

What does the number 18409 look like?

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

18409 is an odd composite number. It is composed of two distinct prime numbers multiplied together. It has a total of four divisors.

## Prime factorization of 18409:

### 41 × 449

See below for interesting mathematical facts about the number 18409 from the Numbermatics database.

### Names of 18409

• Cardinal: 18409 can be written as Eighteen thousand, four hundred nine.

### Scientific notation

• Scientific notation: 1.8409 × 104

### Factors of 18409

• Number of distinct prime factors ω(n): 2
• Total number of prime factors Ω(n): 2
• Sum of prime factors: 490

### Divisors of 18409

• Number of divisors d(n): 4
• Complete list of divisors:
• Sum of all divisors σ(n): 18900
• Sum of proper divisors (its aliquot sum) s(n): 491
• 18409 is a deficient number, because the sum of its proper divisors (491) is less than itself. Its deficiency is 17918

### Bases of 18409

• Binary: 1000111111010012
• Base-36: E7D

### Squares and roots of 18409

• 18409 squared (184092) is 338891281
• 18409 cubed (184093) is 6238649591929
• The square root of 18409 is 135.6797700471
• The cube root of 18409 is 26.4044261021

### Scales and comparisons

How big is 18409?
• 18,409 seconds is equal to 5 hours, 6 minutes, 49 seconds.
• To count from 1 to 18,409 would take you about five 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 18409 cubic inches would be around 2.2 feet tall.

### Recreational maths with 18409

• 18409 backwards is 90481
• The number of decimal digits it has is: 5
• The sum of 18409's digits is 22
• More coming soon!