398478 has 8 divisors (see below), whose sum is σ = 796968. Its totient is φ = 132824.

The previous prime is 398477. The next prime is 398491. The reversal of 398478 is 874893.

398478 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

398478 is an admirable number.

It is a nialpdrome in base 9.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 398478.

It is not an unprimeable number, because it can be changed into a prime (398471) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 33201 + ... + 33212.

It is an arithmetic number, because the mean of its divisors is an integer number (99621).

2³⁹⁸⁴⁷⁸ is an apocalyptic number.

398478 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

398478 is a wasteful number, since it uses less digits than its factorization.

398478 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66418.

The product of its digits is 48384, while the sum is 39.

The square root of 398478 is about 631.2511386128. The cubic root of 398478 is about 73.5870595948.

The spelling of 398478 in words is "three hundred ninety-eight thousand, four hundred seventy-eight".