204440728 has 8 divisors (see below), whose sum is σ = 383326380. Its totient is φ = 102220360.

The previous prime is 204440711. The next prime is 204440729. The reversal of 204440728 is 827044402.

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×204440728² = 83592022530339968, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 204440728.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (204440729) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12777538 + ... + 12777553.

Almost surely, 2^204440728 is an apocalyptic number.

It is an amenable number.

204440728 is a deficient number, since it is larger than the sum of its proper divisors (178885652).

204440728 is a wasteful number, since it uses less digits than its factorization.

204440728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25555097 (or 25555093 counting only the distinct ones).

The product of its (nonzero) digits is 14336, while the sum is 31.

The square root of 204440728 is about 14298.2770990074. The cubic root of 204440728 is about 589.1001585115.

The spelling of 204440728 in words is "two hundred four million, four hundred forty thousand, seven hundred twenty-eight".