204638 has 16 divisors (see below), whose sum is σ = 359424. Its totient is φ = 85560.

The previous prime is 204623. The next prime is 204641. The reversal of 204638 is 836402.

It is a happy number.

It is a super-2 number, since 2×204638² = 83753422088, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 503 + ... + 813.

It is an arithmetic number, because the mean of its divisors is an integer number (22464).

2²⁰⁴⁶³⁸ is an apocalyptic number.

204638 is a deficient number, since it is larger than the sum of its proper divisors (154786).

204638 is a wasteful number, since it uses less digits than its factorization.

204638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 367.

The product of its (nonzero) digits is 1152, while the sum is 23.

The square root of 204638 is about 452.3693181461. The cubic root of 204638 is about 58.9289578706.

The spelling of 204638 in words is "two hundred four thousand, six hundred thirty-eight".