# 628

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

What does the number 628 look like?

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

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

## Prime factorization of 628:

### 22 × 157

(2 × 2 × 157)

See below for interesting mathematical facts about the number 628 from the Numbermatics database.

### Names of 628

• Cardinal: 628 can be written as Six hundred twenty-eight.

### Scientific notation

• Scientific notation: 6.28 × 102

### Factors of 628

• Number of distinct prime factors ω(n): 2
• Total number of prime factors Ω(n): 3
• Sum of prime factors: 159

### Divisors of 628

• Number of divisors d(n): 6
• Complete list of divisors:
• Sum of all divisors σ(n): 1106
• Sum of proper divisors (its aliquot sum) s(n): 478
• 628 is a deficient number, because the sum of its proper divisors (478) is less than itself. Its deficiency is 150

### Bases of 628

• Binary: 10011101002
• Base-36: HG

### Squares and roots of 628

• 628 squared (6282) is 394384
• 628 cubed (6283) is 247673152
• The square root of 628 is 25.0599281723
• The cube root of 628 is 8.5635377115

### Scales and comparisons

How big is 628?
• 628 seconds is equal to 10 minutes, 28 seconds.
• To count from 1 to 628 would take you about five 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 628 cubic inches would be around 0.7 feet tall.

### Recreational maths with 628

• 628 backwards is 826
• The number of decimal digits it has is: 3
• The sum of 628's digits is 16
• More coming soon!