even, composite, triangular · 820th positive integer
The number 820
820 is an even composite number. It is the 820th positive integer.
Quick reference
| Prime factorization | 2 × 2 × 5 × 41 |
| Divisors | 1, 2, 4, 5, 10, 20, 41, 82, 164, 205, 410, 820 |
| Binary | 1100110100 |
| Hexadecimal | 0x334 |
| Roman numeral | DCCCXX |
| Digit sum | 10 |
| Properties | even, composite, triangular |
Reading 820 in NumGrid context
The 820 record above pulls directly from classical number theory plus NumGrid solver-derived puzzle statistics. What follows is the per-entity context — how 820 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.
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 820 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 820 a prime number?
No. 820 is composite. Its prime factorization is 2 × 2 × 5 × 41.
What are the factors of 820?
The factors (divisors) of 820 are 1, 2, 4, 5, 10, 20, 41, 82, 164, 205, 410, 820.
What is 820 in binary?
820 in binary is 1100110100. In hexadecimal it's 334.
What is 820 as a Roman numeral?
820 in Roman numerals is DCCCXX.
What's the digit sum of 820?
Adding the digits of 820: 8 + 2 + 0 = 10.