# 8405

## 8,405 is an odd composite number composed of two prime numbers multiplied together.

What does the number 8405 look like?

This visualization shows the relationship between its 2 prime factors (large circles) and 6 divisors.

8405 is an odd composite number. It is composed of two distinct prime numbers multiplied together. It has a total of six divisors.

## Prime factorization of 8405:

### 5 × 412

(5 × 41 × 41)

See below for interesting mathematical facts about the number 8405 from the Numbermatics database.

### Names of 8405

• Cardinal: 8405 can be written as Eight thousand, four hundred five.

### Scientific notation

• Scientific notation: 8.405 × 103

### Factors of 8405

• Number of distinct prime factors ω(n): 2
• Total number of prime factors Ω(n): 3
• Sum of prime factors: 46

### Divisors of 8405

• Number of divisors d(n): 6
• Complete list of divisors:
• Sum of all divisors σ(n): 10338
• Sum of proper divisors (its aliquot sum) s(n): 1933
• 8405 is a deficient number, because the sum of its proper divisors (1933) is less than itself. Its deficiency is 6472

### Bases of 8405

• Binary: 100000110101012
• Base-36: 6HH

### Squares and roots of 8405

• 8405 squared (84052) is 70644025
• 8405 cubed (84053) is 593763030125
• The square root of 8405 is 91.6787870775
• The cube root of 8405 is 20.3319596551

### Scales and comparisons

How big is 8405?
• 8,405 seconds is equal to 2 hours, 20 minutes, 5 seconds.
• To count from 1 to 8,405 would take you about 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 8405 cubic inches would be around 1.7 feet tall.

### Recreational maths with 8405

• 8405 backwards is 5048
• The number of decimal digits it has is: 4
• The sum of 8405's digits is 17
• More coming soon!