204438 has 16 divisors (see below), whose sum is σ = 440496. Its totient is φ = 62880.

The previous prime is 204437. The next prime is 204439. The reversal of 204438 is 834402.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (204437) and next prime (204439).

It is a super-3 number, since 3×204438³ = 25633394749667016, which contains 333 as substring.

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 204438.

It is not an unprimeable number, because it can be changed into a prime (204431) 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, 1233 + ... + 1388.

It is an arithmetic number, because the mean of its divisors is an integer number (27531).

2²⁰⁴⁴³⁸ is an apocalyptic number.

204438 is an abundant number, since it is smaller than the sum of its proper divisors (236058).

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

204438 is a wasteful number, since it uses less digits than its factorization.

204438 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2639.

The product of its (nonzero) digits is 768, while the sum is 21.

The square root of 204438 is about 452.1482057910. The cubic root of 204438 is about 58.9097538237.

The spelling of 204438 in words is "two hundred four thousand, four hundred thirty-eight".