398868 has 24 divisors (see below), whose sum is σ = 953568. Its totient is φ = 129696.

The previous prime is 398863. The next prime is 398887. The reversal of 398868 is 868893.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (398863) 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 7 ways as a sum of consecutive naturals, for example, 130 + ... + 902.

It is an arithmetic number, because the mean of its divisors is an integer number (39732).

2³⁹⁸⁸⁶⁸ is an apocalyptic number.

It is an amenable number.

398868 is an abundant number, since it is smaller than the sum of its proper divisors (554700).

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

398868 is a wasteful number, since it uses less digits than its factorization.

398868 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 823 (or 821 counting only the distinct ones).

The product of its digits is 82944, while the sum is 42.

The square root of 398868 is about 631.5599733992. The cubic root of 398868 is about 73.6110589085.

The spelling of 398868 in words is "three hundred ninety-eight thousand, eight hundred sixty-eight".