204128 has 12 divisors (see below), whose sum is σ = 401940. Its totient is φ = 102048.

The previous prime is 204107. The next prime is 204133. The reversal of 204128 is 821402.

It is a congruent number.

It is an unprimeable number.

204128 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3158 + ... + 3221.

It is an arithmetic number, because the mean of its divisors is an integer number (33495).

2²⁰⁴¹²⁸ is an apocalyptic number.

204128 is the 242-nd centered heptagonal number.

It is an amenable number.

204128 is a deficient number, since it is larger than the sum of its proper divisors (197812).

204128 is an equidigital number, since it uses as much as digits as its factorization.

204128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6389 (or 6381 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 17.

The square root of 204128 is about 451.8052677869. The cubic root of 204128 is about 58.8799627835.

The spelling of 204128 in words is "two hundred four thousand, one hundred twenty-eight".