even, composite, triangular · 990th positive integer
The number 990
990 is an even composite number. It is the 990th positive integer.
Quick reference
| Prime factorization | 2 × 3 × 3 × 5 × 11 |
| Divisors | 1, 2, 3, 5, 6, 9, 10, 11, 15, 18, 22, 30, 33, 45, 55, 66, 90, 99, 110, 165, 198, 330, 495, 990 |
| Binary | 1111011110 |
| Hexadecimal | 0x3DE |
| Roman numeral | CMXC |
| Digit sum | 18 |
| Properties | even, composite, triangular |
Reading 990 in NumGrid context
For 990, 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.
Every number on this page links back to classical number theory plus NumGrid solver-derived puzzle statistics; the methodology page describes the inputs, refresh cadence, and known limitations of the underlying data product.
Practical use of this page is in combination with the comparison and ranking pages elsewhere on the site, which surface the same data for 990’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 990 a prime number?
No. 990 is composite. Its prime factorization is 2 × 3 × 3 × 5 × 11.
What are the factors of 990?
The factors (divisors) of 990 are 1, 2, 3, 5, 6, 9, 10, 11, 15, 18, 22, 30, 33, 45, 55, 66, 90, 99, 110, 165, 198, 330, 495, 990.
What is 990 in binary?
990 in binary is 1111011110. In hexadecimal it's 3DE.
What is 990 as a Roman numeral?
990 in Roman numerals is CMXC.
What's the digit sum of 990?
Adding the digits of 990: 9 + 9 + 0 = 18.