398538 has 24 divisors (see below), whose sum is σ = 987168. Its totient is φ = 113832.

The previous prime is 398509. The next prime is 398539. The reversal of 398538 is 835893.

It is a Curzon number.

It is a nialpdrome in base 9.

It is not an unprimeable number, because it can be changed into a prime (398539) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1456 + ... + 1707.

It is an arithmetic number, because the mean of its divisors is an integer number (41132).

2³⁹⁸⁵³⁸ is an apocalyptic number.

398538 is an abundant number, since it is smaller than the sum of its proper divisors (588630).

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

398538 is a wasteful number, since it uses less digits than its factorization.

398538 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3178 (or 3175 counting only the distinct ones).

The product of its digits is 25920, while the sum is 36.

The square root of 398538 is about 631.2986614907. The cubic root of 398538 is about 73.5907528159.

The spelling of 398538 in words is "three hundred ninety-eight thousand, five hundred thirty-eight".