446

446 is a natural number that comes after 445 and before 447. In mathematics, it is an even composite number. Its prime factorization is 2 × 223, with 223 being prime, so 446 is a semiprime. The sum of its decimal digits is 14, and it is not a prime, a square, or a cube. It is congruent to 2 modulo 3 and to 1 modulo 5.

In numeral systems, 446 is written as CDXLVI in Roman numerals. In binary it is 110111110; in octal it is 676; and in hexadecimal it is 0x1BE.

As a calendar year, 446 BC and AD 446 appear in historical records. The events of those years depend on the region and calendar system in use, with 446 BC situated in the late classical period of the Greek world and surrounding regions, and AD 446 lying within the later Roman Empire.

No single widely recognized constant or designation is uniquely associated with the number 446. It appears in arithmetic, encoding, and cataloging contexts as a ordinary integer without a dominant cultural or scientific significance.