even, composite · 840th positive integer

The number 840

840 is an even composite number. It is the 840th positive integer.

Quick reference

Prime factorization	2 × 2 × 2 × 3 × 5 × 7
Divisors	1, 2, 3, 4, 5, 6, 7, 8, 10, 12, 14, 15, 20, 21, 24, 28, 30, 35, 40, 42, 56, 60, 70, 84, 105, 120, 140, 168, 210, 280, 420, 840
Binary	1101001000
Hexadecimal	0x348
Roman numeral	DCCCXL
Digit sum	12
Properties	even, composite

Reading 840 in NumGrid context

The 840 record above pulls directly from classical number theory plus NumGrid solver-derived puzzle statistics. What follows is the per-entity context — how 840 sits in the broader integer properties and number-guessing puzzles distribution and which underlying factors drive the headline numbers.

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 840’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 840 a prime number?

No. 840 is composite. Its prime factorization is 2 × 2 × 2 × 3 × 5 × 7.

What are the factors of 840?

The factors (divisors) of 840 are 1, 2, 3, 4, 5, 6, 7, 8, 10, 12, 14, 15, 20, 21, 24, 28, 30, 35, 40, 42, 56, 60, 70, 84, 105, 120, 140, 168, 210, 280, 420, 840.