1238

1238 is a natural number that comes after 1237 and before 1239. It is an even, composite number.

Its prime factorization is 2 × 619, with 619 being a prime number. Therefore, 1238 is a semiprime and has exactly four divisors: 1, 2, 619, and 1238.

In numeral representations, 1238 is MCCXXXVIII in Roman numerals; in binary it is 10011010110, and in hexadecimal it is 0x4D6. The sum of its digits is 14, giving a digital root of 5.

The Euler totient of 1238 is 618, since φ(1238) = 1238(1 − 1/2)(1 − 1/619) = 618.

As a year, 1238 AD occurs in the 13th century in the Julian calendar, a period marked by ongoing medieval political and religious developments across various regions.

Beyond mathematics and history, 1238 is used as a catalog or model number in different domains, and like many integers, it sometimes appears in identifiers, measurements, or coding schemes.