728537456 has 20 divisors (see below), whose sum is σ = 1413797904. Its totient is φ = 363686400.

The previous prime is 728537441. The next prime is 728537471. The reversal of 728537456 is 654735827.

728537456 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (728537441) and next prime (728537471).

It is a self number, because there is not a number n which added to its sum of digits gives 728537456.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25985 + ... + 46176.

Almost surely, 2^728537456 is an apocalyptic number.

It is an amenable number.

728537456 is a deficient number, since it is larger than the sum of its proper divisors (685260448).

728537456 is a wasteful number, since it uses less digits than its factorization.

728537456 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72800 (or 72794 counting only the distinct ones).

The product of its digits is 1411200, while the sum is 47.

The square root of 728537456 is about 26991.4330112353. The cubic root of 728537456 is about 899.8096124028.

The spelling of 728537456 in words is "seven hundred twenty-eight million, five hundred thirty-seven thousand, four hundred fifty-six".