398256 has 20 divisors (see below), whose sum is σ = 1028952. Its totient is φ = 132736.

The previous prime is 398249. The next prime is 398261. The reversal of 398256 is 652893.

It is a happy number.

It is an unprimeable number.

398256 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4101 + ... + 4196.

2³⁹⁸²⁵⁶ is an apocalyptic number.

It is an amenable number.

398256 is an abundant number, since it is smaller than the sum of its proper divisors (630696).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

398256 is a wasteful number, since it uses less digits than its factorization.

398256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8308 (or 8302 counting only the distinct ones).

The product of its digits is 12960, while the sum is 33.

The square root of 398256 is about 631.0752728479. The cubic root of 398256 is about 73.5733914526.

The spelling of 398256 in words is "three hundred ninety-eight thousand, two hundred fifty-six".