204478 has 8 divisors (see below), whose sum is σ = 322920. Its totient is φ = 96840.

The previous prime is 204461. The next prime is 204481. The reversal of 204478 is 874402.

204478 = T₃₂ + T₃₃ + ... + T₁₀₇.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×204478² = 83622504968, 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 3 ways as a sum of consecutive naturals, for example, 2653 + ... + 2728.

It is an arithmetic number, because the mean of its divisors is an integer number (40365).

2²⁰⁴⁴⁷⁸ is an apocalyptic number.

204478 is a deficient number, since it is larger than the sum of its proper divisors (118442).

204478 is a wasteful number, since it uses less digits than its factorization.

204478 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5402.

The product of its (nonzero) digits is 1792, while the sum is 25.

The square root of 204478 is about 452.1924369115. The cubic root of 204478 is about 58.9135956347.

The spelling of 204478 in words is "two hundred four thousand, four hundred seventy-eight".