728809568 has 12 divisors (see below), whose sum is σ = 1434843900. Its totient is φ = 364404768.

The previous prime is 728809561. The next prime is 728809573. The reversal of 728809568 is 865908827.

It is a Smith number, since the sum of its digits (53) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (728809561) by changing a digit.

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 as a sum of consecutive naturals, namely, 11387618 + ... + 11387681.

It is an arithmetic number, because the mean of its divisors is an integer number (119570325).

Almost surely, 2^728809568 is an apocalyptic number.

It is an amenable number.

728809568 is a deficient number, since it is larger than the sum of its proper divisors (706034332).

728809568 is a wasteful number, since it uses less digits than its factorization.

728809568 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22775309 (or 22775301 counting only the distinct ones).

The product of its (nonzero) digits is 1935360, while the sum is 53.

The square root of 728809568 is about 26996.4732511489. The cubic root of 728809568 is about 899.9216260970.

The spelling of 728809568 in words is "seven hundred twenty-eight million, eight hundred nine thousand, five hundred sixty-eight".