# 158

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

What does the number 158 look like?

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

158 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 158:

### 2 × 79

See below for interesting mathematical facts about the number 158 from the Numbermatics database.

### Names of 158

• Cardinal: 158 can be written as One hundred fifty-eight.

### Scientific notation

• Scientific notation: 1.58 × 102

### Factors of 158

• Number of distinct prime factors ω(n): 2
• Total number of prime factors Ω(n): 2
• Sum of prime factors: 81

### Divisors of 158

• Number of divisors d(n): 4
• Complete list of divisors:
• Sum of all divisors σ(n): 240
• Sum of proper divisors (its aliquot sum) s(n): 82
• 158 is a deficient number, because the sum of its proper divisors (82) is less than itself. Its deficiency is 76

### Bases of 158

• Binary: 100111102
• Base-36: 4E

### Squares and roots of 158

• 158 squared (1582) is 24964
• 158 cubed (1583) is 3944312
• The square root of 158 is 12.5698050899
• The cube root of 158 is 5.4061201757

### Scales and comparisons

How big is 158?
• 158 seconds is equal to 2 minutes, 38 seconds.
• To count from 1 to 158 would take you about nineteen 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 158 cubic inches would be around 0.5 feet tall.

### Recreational maths with 158

• 158 backwards is 851
• The number of decimal digits it has is: 3
• The sum of 158's digits is 14
• More coming soon!

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The information we have on file for 158 includes mathematical data and numerical statistics calculated using standard algorithms and methods. We are adding more all the time. If there are any features you would like to see, please contact us. Information provided for educational use, intellectual curiosity and fun!

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