204378 has 16 divisors (see below), whose sum is σ = 426816. Its totient is φ = 65120.

The previous prime is 204377. The next prime is 204397. The reversal of 204378 is 873402.

It is a Smith number, since the sum of its digits (24) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (204371) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 603 + ... + 878.

It is an arithmetic number, because the mean of its divisors is an integer number (26676).

2²⁰⁴³⁷⁸ is an apocalyptic number.

204378 is an abundant number, since it is smaller than the sum of its proper divisors (222438).

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

204378 is a wasteful number, since it uses less digits than its factorization.

204378 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1509.

The product of its (nonzero) digits is 1344, while the sum is 24.

The square root of 204378 is about 452.0818509960. The cubic root of 204378 is about 58.9039901675.

Adding to 204378 its sum of digits (24), we get a palindrome (204402).

The spelling of 204378 in words is "two hundred four thousand, three hundred seventy-eight".