728672045172 has 12 divisors (see below), whose sum is σ = 1700234772096. Its totient is φ = 242890681720.

The previous prime is 728672045093. The next prime is 728672045207. The reversal of 728672045172 is 271540276827.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 30361335204 + ... + 30361335227.

It is an arithmetic number, because the mean of its divisors is an integer number (141686231008).

Almost surely, 2^728672045172 is an apocalyptic number.

It is an amenable number.

728672045172 is an abundant number, since it is smaller than the sum of its proper divisors (971562726924).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

728672045172 is a wasteful number, since it uses less digits than its factorization.

728672045172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60722670438 (or 60722670436 counting only the distinct ones).

The product of its (nonzero) digits is 2634240, while the sum is 51.

The spelling of 728672045172 in words is "seven hundred twenty-eight billion, six hundred seventy-two million, forty-five thousand, one hundred seventy-two".