398634 has 24 divisors (see below), whose sum is σ = 836160. Its totient is φ = 126672.

The previous prime is 398627. The next prime is 398669. The reversal of 398634 is 436893.

It is a junction number, because it is equal to n+sod(n) for n = 398595 and 398604.

It is an unprimeable number.

398634 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5007 + ... + 5085.

It is an arithmetic number, because the mean of its divisors is an integer number (34840).

2³⁹⁸⁶³⁴ is an apocalyptic number.

398634 is an abundant number, since it is smaller than the sum of its proper divisors (437526).

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

398634 is a wasteful number, since it uses less digits than its factorization.

398634 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 142 (or 113 counting only the distinct ones).

The product of its digits is 15552, while the sum is 33.

The square root of 398634 is about 631.3746906552. The cubic root of 398634 is about 73.5966611986.

The spelling of 398634 in words is "three hundred ninety-eight thousand, six hundred thirty-four".