even, composite · 158th positive integer
The number 158
158 is an even composite number. It is the 158th positive integer.
Quick reference
| Prime factorization | 2 × 79 |
| Divisors | 1, 2, 79, 158 |
| Binary | 10011110 |
| Hexadecimal | 0x9E |
| Roman numeral | CLVIII |
| Digit sum | 14 |
| Properties | even, composite |
Reading 158 in NumGrid context
The 158 record above pulls directly from classical number theory plus NumGrid solver-derived puzzle statistics. What follows is the per-entity context — how 158 sits in the broader integer properties and number-guessing puzzles distribution and which underlying factors drive the headline numbers.
The methodology behind every numeric value on this page is publicly documented on the classical number theory plus NumGrid solver-derived puzzle statistics portal and described in detail on this site’s methodology page. Refresh cadence varies by underlying series; the page surfaces the as-of date for each number so readers can trace any figure back to the source release.
Practical use of this page is in combination with the comparison and ranking pages elsewhere on the site, which surface the same data for 158’s peers within positive integers within the NumGrid target pool. A single-entity reading without peer context can be misleading when an entity is an outlier on one axis but typical on another.
Frequently asked
Is 158 a prime number?
No. 158 is composite. Its prime factorization is 2 × 79.
What are the factors of 158?
The factors (divisors) of 158 are 1, 2, 79, 158.
What is 158 in binary?
158 in binary is 10011110. In hexadecimal it's 9E.
What is 158 as a Roman numeral?
158 in Roman numerals is CLVIII.
What's the digit sum of 158?
Adding the digits of 158: 1 + 5 + 8 = 14.