728708469780 has 96 divisors (see below), whose sum is σ = 2043355507200. Its totient is φ = 194039475328.

The previous prime is 728708469763. The next prime is 728708469799. The reversal of 728708469780 is 87964807827.

It is a Smith number, since the sum of its digits (66) coincides with the sum of the digits of its prime factors.

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 31 ways as a sum of consecutive naturals, for example, 185750899 + ... + 185754821.

It is an arithmetic number, because the mean of its divisors is an integer number (21284953200).

Almost surely, 2^728708469780 is an apocalyptic number.

It is an amenable number.

728708469780 is an abundant number, since it is smaller than the sum of its proper divisors (1314647037420).

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

728708469780 is a wasteful number, since it uses less digits than its factorization.

728708469780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7653 (or 7651 counting only the distinct ones).

The product of its (nonzero) digits is 75866112, while the sum is 66.

The spelling of 728708469780 in words is "seven hundred twenty-eight billion, seven hundred eight million, four hundred sixty-nine thousand, seven hundred eighty".