728918564 has 12 divisors (see below), whose sum is σ = 1391571888. Its totient is φ = 331326600.

The previous prime is 728918557. The next prime is 728918569. The reversal of 728918564 is 465819827.

It is not an unprimeable number, because it can be changed into a prime (728918569) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8283122 + ... + 8283209.

It is an arithmetic number, because the mean of its divisors is an integer number (115964324).

Almost surely, 2^728918564 is an apocalyptic number.

It is an amenable number.

728918564 is a deficient number, since it is larger than the sum of its proper divisors (662653324).

728918564 is a wasteful number, since it uses less digits than its factorization.

728918564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16566346 (or 16566344 counting only the distinct ones).

The product of its digits is 967680, while the sum is 50.

The square root of 728918564 is about 26998.4918838071. The cubic root of 728918564 is about 899.9664859948.

The spelling of 728918564 in words is "seven hundred twenty-eight million, nine hundred eighteen thousand, five hundred sixty-four".