1438

1438 can refer to the integer itself or to the year 1438 in the common era. As a number, 1438 is even and composite, with a prime factorization of 2 × 719. Its positive divisors are 1, 2, 719, and 1438. The sum of its proper divisors is 1 + 2 + 719 = 722, which means 1438 is a deficient number. Its digits sum to 16, giving a digital root of 7. In various bases, 1438 is represented as follows: in binary, 10110011110; in hexadecimal, 0x59E; in octal, 2636. In Roman numerals, 1438 is written as MCDXXXVIII.

As a calendar year, 1438 CE falls in the late Middle Ages within the Julian calendar, since the Gregorian reform occurred several centuries later. It was not a leap year. The year sits in the 15th century, a period characterized by feudal and emerging centralized structures in parts of Europe, ongoing religious and cultural transformations, and regional political realignments. Across different regions, contemporary records would describe a variety of political, military, economic, and cultural developments, but they are not uniformly documented in a single, global narrative for this specific year.

In summary, 1438 is primarily notable for its mathematical properties as a composite number with a simple factorization, and as a historical year in the Julian-era medieval world.