728921056 has 12 divisors (see below), whose sum is σ = 1435063392. Its totient is φ = 364460512.

The previous prime is 728921033. The next prime is 728921093. The reversal of 728921056 is 650129827.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11389360 + ... + 11389423.

It is an arithmetic number, because the mean of its divisors is an integer number (119588616).

Almost surely, 2^728921056 is an apocalyptic number.

It is an amenable number.

728921056 is a deficient number, since it is larger than the sum of its proper divisors (706142336).

728921056 is a wasteful number, since it uses less digits than its factorization.

728921056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22778793 (or 22778785 counting only the distinct ones).

The product of its (nonzero) digits is 60480, while the sum is 40.

The square root of 728921056 is about 26998.5380344936. The cubic root of 728921056 is about 899.9675115844.

The spelling of 728921056 in words is "seven hundred twenty-eight million, nine hundred twenty-one thousand, fifty-six".