# 478

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

What does the number 478 look like?

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

478 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 478:

### 2 × 239

See below for interesting mathematical facts about the number 478 from the Numbermatics database.

### Names of 478

• Cardinal: 478 can be written as Four hundred seventy-eight.

### Scientific notation

• Scientific notation: 4.78 × 102

### Factors of 478

• Number of distinct prime factors ω(n): 2
• Total number of prime factors Ω(n): 2
• Sum of prime factors: 241

### Divisors of 478

• Number of divisors d(n): 4
• Complete list of divisors:
• Sum of all divisors σ(n): 720
• Sum of proper divisors (its aliquot sum) s(n): 242
• 478 is a deficient number, because the sum of its proper divisors (242) is less than itself. Its deficiency is 236

### Bases of 478

• Binary: 1110111102
• Base-36: DA

### Squares and roots of 478

• 478 squared (4782) is 228484
• 478 cubed (4783) is 109215352
• The square root of 478 is 21.8632111091
• The cube root of 478 is 7.8188455113

### Scales and comparisons

How big is 478?
• 478 seconds is equal to 7 minutes, 58 seconds.
• To count from 1 to 478 would take you about three 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 478 cubic inches would be around 0.7 feet tall.

### Recreational maths with 478

• 478 backwards is 874
• The number of decimal digits it has is: 3
• The sum of 478's digits is 19
• More coming soon!