398878 has 12 divisors (see below), whose sum is σ = 618408. Its totient is φ = 192920.

The previous prime is 398863. The next prime is 398887. The reversal of 398878 is 878893.

It is a happy number.

398878 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

Its product of digits (96768) is a multiple of the sum of its prime divisors (126).

It is a congruent number.

It is an unprimeable number.

398878 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 5 ways as a sum of consecutive naturals, for example, 5583 + ... + 5653.

It is an arithmetic number, because the mean of its divisors is an integer number (51534).

2³⁹⁸⁸⁷⁸ is an apocalyptic number.

398878 is a deficient number, since it is larger than the sum of its proper divisors (219530).

398878 is an equidigital number, since it uses as much as digits as its factorization.

398878 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 179 (or 126 counting only the distinct ones).

The product of its digits is 96768, while the sum is 43.

The square root of 398878 is about 631.5678902541. The cubic root of 398878 is about 73.6116740698.

The spelling of 398878 in words is "three hundred ninety-eight thousand, eight hundred seventy-eight".