even, composite · 428th positive integer
The number 428
428 is an even composite number. It is the 428th positive integer.
Quick reference
| Prime factorization | 2 × 2 × 107 |
| Divisors | 1, 2, 4, 107, 214, 428 |
| Binary | 110101100 |
| Hexadecimal | 0x1AC |
| Roman numeral | CDXXVIII |
| Digit sum | 14 |
| Properties | even, composite |
Reading 428 in NumGrid context
For 428, 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.
For readers using this page as a decision input, the related-entity pages elsewhere on the site provide the comparison set. The most useful comparison for 428 is typically a peer within positive integers within the NumGrid target pool with similar size, similar exposure, or similar geography — not the national-level summary alone.
Frequently asked
Is 428 a prime number?
No. 428 is composite. Its prime factorization is 2 × 2 × 107.
What are the factors of 428?
The factors (divisors) of 428 are 1, 2, 4, 107, 214, 428.
What is 428 in binary?
428 in binary is 110101100. In hexadecimal it's 1AC.
What is 428 as a Roman numeral?
428 in Roman numerals is CDXXVIII.
What's the digit sum of 428?
Adding the digits of 428: 4 + 2 + 8 = 14.