204398728 has 16 divisors (see below), whose sum is σ = 396463500. Its totient is φ = 98675136.

The previous prime is 204398707. The next prime is 204398741. The reversal of 204398728 is 827893402.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 189943524 + 14455204 = 13782^2 + 3802^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 440283 + ... + 440746.

Almost surely, 2^204398728 is an apocalyptic number.

It is an amenable number.

204398728 is a deficient number, since it is larger than the sum of its proper divisors (192064772).

204398728 is a wasteful number, since it uses less digits than its factorization.

204398728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 881064 (or 881060 counting only the distinct ones).

The product of its (nonzero) digits is 193536, while the sum is 43.

The square root of 204398728 is about 14296.8083151450. The cubic root of 204398728 is about 589.0598144610.

The spelling of 204398728 in words is "two hundred four million, three hundred ninety-eight thousand, seven hundred twenty-eight".