728663366888 has 8 divisors (see below), whose sum is σ = 1366243812930. Its totient is φ = 364331683440.

The previous prime is 728663366887. The next prime is 728663366903. The reversal of 728663366888 is 888663366827.

It can be written as a sum of positive squares in only one way, i.e., 638340277444 + 90323089444 = 798962^2 + 300538^2 .

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

It is not an unprimeable number, because it can be changed into a prime (728663366887) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45541460423 + ... + 45541460438.

Almost surely, 2^728663366888 is an apocalyptic number.

It is an amenable number.

728663366888 is a deficient number, since it is larger than the sum of its proper divisors (637580446042).

728663366888 is a wasteful number, since it uses less digits than its factorization.

728663366888 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91082920867 (or 91082920863 counting only the distinct ones).

The product of its digits is 668860416, while the sum is 71.

The spelling of 728663366888 in words is "seven hundred twenty-eight billion, six hundred sixty-three million, three hundred sixty-six thousand, eight hundred eighty-eight".