728863664 has 10 divisors (see below), whose sum is σ = 1412173380. Its totient is φ = 364431824.

The previous prime is 728863657. The next prime is 728863691. The reversal of 728863664 is 466368827.

728863664 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22776974 + ... + 22777005.

It is an arithmetic number, because the mean of its divisors is an integer number (141217338).

Almost surely, 2^728863664 is an apocalyptic number.

It is an amenable number.

728863664 is a deficient number, since it is larger than the sum of its proper divisors (683309716).

728863664 is a wasteful number, since it uses less digits than its factorization.

728863664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45553987 (or 45553981 counting only the distinct ones).

The product of its digits is 2322432, while the sum is 50.

The square root of 728863664 is about 26997.4751412053. The cubic root of 728863664 is about 899.9438911523.

The spelling of 728863664 in words is "seven hundred twenty-eight million, eight hundred sixty-three thousand, six hundred sixty-four".