728847928 has 8 divisors (see below), whose sum is σ = 1366589880. Its totient is φ = 364423960.

The previous prime is 728847907. The next prime is 728847929. The reversal of 728847928 is 829748827.

728847928 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (728847929) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45552988 + ... + 45553003.

It is an arithmetic number, because the mean of its divisors is an integer number (170823735).

Almost surely, 2^728847928 is an apocalyptic number.

It is an amenable number.

728847928 is a deficient number, since it is larger than the sum of its proper divisors (637741952).

728847928 is a wasteful number, since it uses less digits than its factorization.

728847928 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91105997 (or 91105993 counting only the distinct ones).

The product of its digits is 3612672, while the sum is 55.

The square root of 728847928 is about 26997.1837049719. The cubic root of 728847928 is about 899.9374145780.

The spelling of 728847928 in words is "seven hundred twenty-eight million, eight hundred forty-seven thousand, nine hundred twenty-eight".