728491672 has 16 divisors (see below), whose sum is σ = 1366218000. Its totient is φ = 364166880.

The previous prime is 728491663. The next prime is 728491691. The reversal of 728491672 is 276194827.

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, 52597 + ... + 64987.

It is an arithmetic number, because the mean of its divisors is an integer number (85388625).

Almost surely, 2^728491672 is an apocalyptic number.

It is an amenable number.

728491672 is a deficient number, since it is larger than the sum of its proper divisors (637726328).

728491672 is a wasteful number, since it uses less digits than its factorization.

728491672 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19746 (or 19742 counting only the distinct ones).

The product of its digits is 338688, while the sum is 46.

The square root of 728491672 is about 26990.5848769529. The cubic root of 728491672 is about 899.7907628818.

The spelling of 728491672 in words is "seven hundred twenty-eight million, four hundred ninety-one thousand, six hundred seventy-two".