204756428 has 6 divisors (see below), whose sum is σ = 358323756. Its totient is φ = 102378212.

The previous prime is 204756421. The next prime is 204756451. The reversal of 204756428 is 824657402.

It is a junction number, because it is equal to n+sod(n) for n = 204756391 and 204756400.

It is not an unprimeable number, because it can be changed into a prime (204756421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25594550 + ... + 25594557.

It is an arithmetic number, because the mean of its divisors is an integer number (59720626).

Almost surely, 2^204756428 is an apocalyptic number.

It is an amenable number.

204756428 is a deficient number, since it is larger than the sum of its proper divisors (153567328).

204756428 is a wasteful number, since it uses less digits than its factorization.

204756428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51189111 (or 51189109 counting only the distinct ones).

The product of its (nonzero) digits is 107520, while the sum is 38.

The square root of 204756428 is about 14309.3126319890. The cubic root of 204756428 is about 589.4032345727.

The spelling of 204756428 in words is "two hundred four million, seven hundred fifty-six thousand, four hundred twenty-eight".