728673264432 has 60 divisors (see below), whose sum is σ = 2065086709920. Its totient is φ = 239816513664.

The previous prime is 728673264343. The next prime is 728673264443. The reversal of 728673264432 is 234462376827.

728673264432 is a `hidden beast` number, since 7 + 2 + 86 + 73 + 2 + 64 + 432 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 32015403 + ... + 32038154.

It is an arithmetic number, because the mean of its divisors is an integer number (34418111832).

Almost surely, 2^728673264432 is an apocalyptic number.

728673264432 is a gapful number since it is divisible by the number (72) formed by its first and last digit.

It is an amenable number.

728673264432 is an abundant number, since it is smaller than the sum of its proper divisors (1336413445488).

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

728673264432 is a wasteful number, since it uses less digits than its factorization.

728673264432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64053650 (or 64053641 counting only the distinct ones).

The product of its digits is 16257024, while the sum is 54.

The spelling of 728673264432 in words is "seven hundred twenty-eight billion, six hundred seventy-three million, two hundred sixty-four thousand, four hundred thirty-two".