978204 has 12 divisors (see below), whose sum is σ = 2282504. Its totient is φ = 326064.

The previous prime is 978203. The next prime is 978209. The reversal of 978204 is 402879.

It is a tau number, because it is divible by the number of its divisors (12).

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (978203) 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, 40747 + ... + 40770.

2⁹⁷⁸²⁰⁴ is an apocalyptic number.

It is an amenable number.

978204 is an abundant number, since it is smaller than the sum of its proper divisors (1304300).

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

978204 is a wasteful number, since it uses less digits than its factorization.

978204 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81524 (or 81522 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 30.

The square root of 978204 is about 989.0419606872. The cubic root of 978204 is about 99.2681232991.

The spelling of 978204 in words is "nine hundred seventy-eight thousand, two hundred four".