204078 has 32 divisors (see below), whose sum is σ = 481536. Its totient is φ = 56448.

The previous prime is 204067. The next prime is 204101. The reversal of 204078 is 870402.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1750 + ... + 1862.

It is an arithmetic number, because the mean of its divisors is an integer number (15048).

2²⁰⁴⁰⁷⁸ is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 204078, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (240768).

204078 is an abundant number, since it is smaller than the sum of its proper divisors (277458).

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

204078 is a wasteful number, since it uses less digits than its factorization.

204078 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 168.

The product of its (nonzero) digits is 448, while the sum is 21.

The square root of 204078 is about 451.7499308246. The cubic root of 204078 is about 58.8751549529.

The spelling of 204078 in words is "two hundred four thousand, seventy-eight".