398856 has 16 divisors (see below), whose sum is σ = 997200. Its totient is φ = 132944.

The previous prime is 398833. The next prime is 398857. The reversal of 398856 is 658893.

It is a super-2 number, since 2×398856² = 318172217472, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (398857) by changing a digit.

398856 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 3 ways as a sum of consecutive naturals, for example, 8286 + ... + 8333.

It is an arithmetic number, because the mean of its divisors is an integer number (62325).

2³⁹⁸⁸⁵⁶ is an apocalyptic number.

It is an amenable number.

398856 is an abundant number, since it is smaller than the sum of its proper divisors (598344).

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

398856 is a wasteful number, since it uses less digits than its factorization.

398856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16628 (or 16624 counting only the distinct ones).

The product of its digits is 51840, while the sum is 39.

The square root of 398856 is about 631.5504730423. The cubic root of 398856 is about 73.6103207014.

The spelling of 398856 in words is "three hundred ninety-eight thousand, eight hundred fifty-six".