724

724 is a natural number that follows 723 and precedes 725. It is even and composite. Its prime factorization is 2^2 × 181, and its positive divisors are 1, 2, 4, 181, 362, and 724.

In base-10, the sum of its digits is 13. In binary, 724 is 1011010100, and in hexadecimal it is 0x2D4. In Roman numerals, 724 is written as DCCXXIV.

As a year designation, 724 CE (Common Era) and 724 BCE (Before Common Era) are used to label historical dates in different regions and scholarly works.

In the North American Numbering Plan, 724 is an area code serving southwestern Pennsylvania.