even, composite · 398th positive integer
The number 398
398 is an even composite number. It is the 398th positive integer.
Quick reference
| Prime factorization | 2 × 199 |
| Divisors | 1, 2, 199, 398 |
| Binary | 110001110 |
| Hexadecimal | 0x18E |
| Roman numeral | CCCXCVIII |
| Digit sum | 20 |
| Properties | even, composite |
Reading 398 in NumGrid context
For 398, the underlying data on this page comes from classical number theory plus NumGrid solver-derived puzzle statistics. The breakdown above is the federal record; the paragraphs below add the per-entity context that makes the headline numbers usable for a real decision rather than just a data lookup.
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 398’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 398 a prime number?
No. 398 is composite. Its prime factorization is 2 × 199.
What are the factors of 398?
The factors (divisors) of 398 are 1, 2, 199, 398.
What is 398 in binary?
398 in binary is 110001110. In hexadecimal it's 18E.
What is 398 as a Roman numeral?
398 in Roman numerals is CCCXCVIII.
What's the digit sum of 398?
Adding the digits of 398: 3 + 9 + 8 = 20.