The number 398 is an integer that follows 397 and precedes 399. It is an even number, meaning it is divisible by 2 without leaving a remainder. In terms of its prime factorization, 398 can be expressed as 2 × 199, where both 2 and 199 are prime numbers. In the context of mathematics, 398 can be used in various calculations, such as addition, subtraction, multiplication, and division. It can also be represented in different numeral systems, such as binary (110001110) or hexadecimal (0x19E). The number has applications in fields like science, engineering, and finance.