204807728 has 40 divisors (see below), whose sum is σ = 409124112. Its totient is φ = 99249408.

The previous prime is 204807727. The next prime is 204807761. The reversal of 204807728 is 827708402.

It is a junction number, because it is equal to n+sod(n) for n = 204807691 and 204807700.

It is not an unprimeable number, because it can be changed into a prime (204807727) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 204926 + ... + 205922.

Almost surely, 2^204807728 is an apocalyptic number.

It is an amenable number.

204807728 is a deficient number, since it is larger than the sum of its proper divisors (204316384).

204807728 is a wasteful number, since it uses less digits than its factorization.

204807728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1389 (or 1383 counting only the distinct ones).

The product of its (nonzero) digits is 50176, while the sum is 38.

The square root of 204807728 is about 14311.1050586599. The cubic root of 204807728 is about 589.4524538026.

The spelling of 204807728 in words is "two hundred four million, eight hundred seven thousand, seven hundred twenty-eight".