398388 has 12 divisors (see below), whose sum is σ = 929600. Its totient is φ = 132792.

The previous prime is 398369. The next prime is 398393. The reversal of 398388 is 883893.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (12).

It is a nialpdrome in base 9.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16588 + ... + 16611.

2³⁹⁸³⁸⁸ is an apocalyptic number.

It is an amenable number.

398388 is an abundant number, since it is smaller than the sum of its proper divisors (531212).

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

398388 is a wasteful number, since it uses less digits than its factorization.

398388 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33206 (or 33204 counting only the distinct ones).

The product of its digits is 41472, while the sum is 39.

The square root of 398388 is about 631.1798475870. The cubic root of 398388 is about 73.5815190681.

The spelling of 398388 in words is "three hundred ninety-eight thousand, three hundred eighty-eight".