398356 has 24 divisors (see below), whose sum is σ = 818496. Its totient is φ = 166080.

The previous prime is 398353. The next prime is 398357. The reversal of 398356 is 653893.

It is an Ulam number.

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 polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 975 + ... + 1321.

It is an arithmetic number, because the mean of its divisors is an integer number (34104).

2³⁹⁸³⁵⁶ is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 398356, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (409248).

398356 is an abundant number, since it is smaller than the sum of its proper divisors (420140).

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

398356 is a wasteful number, since it uses less digits than its factorization.

398356 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 399 (or 397 counting only the distinct ones).

The product of its digits is 19440, while the sum is 34.

The square root of 398356 is about 631.1544977262. The cubic root of 398356 is about 73.5795489019.

The spelling of 398356 in words is "three hundred ninety-eight thousand, three hundred fifty-six".