398558 has 8 divisors (see below), whose sum is σ = 600600. Its totient is φ = 198360.

The previous prime is 398557. The next prime is 398569. The reversal of 398558 is 855893.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a nialpdrome in base 9.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (398557) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 413 + ... + 983.

It is an arithmetic number, because the mean of its divisors is an integer number (75075).

2³⁹⁸⁵⁵⁸ is an apocalyptic number.

398558 is a deficient number, since it is larger than the sum of its proper divisors (202042).

398558 is a wasteful number, since it uses less digits than its factorization.

398558 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 922.

The product of its digits is 43200, while the sum is 38.

The square root of 398558 is about 631.3145016551. The cubic root of 398558 is about 73.5919838072.

The spelling of 398558 in words is "three hundred ninety-eight thousand, five hundred fifty-eight".