398358 has 20 divisors (see below), whose sum is σ = 892980. Its totient is φ = 132732.

The previous prime is 398357. The next prime is 398369. The reversal of 398358 is 853893.

398358 is nontrivially palindromic in base 16.

It is an Ulam number.

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 (398353) by changing a digit.

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 9 ways as a sum of consecutive naturals, for example, 1068 + ... + 1391.

It is an arithmetic number, because the mean of its divisors is an integer number (44649).

2³⁹⁸³⁵⁸ is an apocalyptic number.

398358 is an abundant number, since it is smaller than the sum of its proper divisors (494622).

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

398358 is a wasteful number, since it uses less digits than its factorization.

398358 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2473 (or 2464 counting only the distinct ones).

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

The square root of 398358 is about 631.1560821223. The cubic root of 398358 is about 73.5796720404.

Subtracting 398358 from its reverse (853893), we obtain a triangular number (455535 = T₉₅₄).

The spelling of 398358 in words is "three hundred ninety-eight thousand, three hundred fifty-eight".