1428

1428 is the natural number that comes after 1427 and before 1429. In Roman numerals it is written as MCDXXVIII. Its prime factorization is 2^2 × 3 × 7 × 17, making it a composite number. It is even and divisible by 3, 4, 6, 7, 12, and 28 among other divisors. The sum of its divisors is 4032, so the sum of proper divisors is 2604, which means 1428 is an abundant number. In decimal, hexadecimal, and binary forms it is 1428, 0x594, and 10110010100, respectively.

1428 as a year: 1428 AD falls in the 15th century. It was a leap year in the Julian calendar. In Central Europe, it was a period marked by continuing conflict related to the Hussite Wars in Bohemia, reflecting the broader religious and political upheavals of the era. The year sits within the late medieval period, a time of evolving governance, religious reform movements, and early forays into Renaissance ideas in various regions.

Summary: The term 1428 encompasses both a specific integer with notable arithmetic properties and a historical year in the 15th century. As a number, it is an abundant, even composite with a factorization of 2^2 × 3 × 7 × 17. As a year, it is associated with the late medieval European landscape and ongoing regional conflicts of its time.