# 156

## 156 is an even composite number composed of three prime numbers multiplied together.

What does the number 156 look like?

This visualization shows the relationship between its 3 prime factors (large circles) and 12 divisors.

156 is an even composite number. It is composed of three distinct prime numbers multiplied together. It has a total of twelve divisors.

## Prime factorization of 156:

### 22 × 3 × 13

(2 × 2 × 3 × 13)

See below for interesting mathematical facts about the number 156 from the Numbermatics database.

### Names of 156

• Cardinal: 156 can be written as One hundred fifty-six.

### Scientific notation

• Scientific notation: 1.56 × 102

### Factors of 156

• Number of distinct prime factors ω(n): 3
• Total number of prime factors Ω(n): 4
• Sum of prime factors: 18

### Divisors of 156

• Number of divisors d(n): 12
• Complete list of divisors:
• Sum of all divisors σ(n): 392
• Sum of proper divisors (its aliquot sum) s(n): 236
• 156 is an abundant number, because the sum of its proper divisors (236) is greater than itself. Its abundance is 80

### Bases of 156

• Binary: 100111002
• Base-36: 4C

### Squares and roots of 156

• 156 squared (1562) is 24336
• 156 cubed (1563) is 3796416
• The square root of 156 is 12.4899959968
• The cube root of 156 is 5.3832126121

### Scales and comparisons

How big is 156?
• 156 seconds is equal to 2 minutes, 36 seconds.
• To count from 1 to 156 would take you about eighteen seconds.

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 156 cubic inches would be around 0.4 feet tall.

### Recreational maths with 156

• 156 backwards is 651
• 156 is a Harshad number.
• The number of decimal digits it has is: 3
• The sum of 156's digits is 12
• More coming soon!