728561922 has 16 divisors (see below), whose sum is σ = 1589589792. Its totient is φ = 220776320.

The previous prime is 728561917. The next prime is 728561947. The reversal of 728561922 is 229165827.

728561922 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5519343 + ... + 5519474.

It is an arithmetic number, because the mean of its divisors is an integer number (99349362).

Almost surely, 2^728561922 is an apocalyptic number.

728561922 is an abundant number, since it is smaller than the sum of its proper divisors (861027870).

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

728561922 is a wasteful number, since it uses less digits than its factorization.

728561922 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11038833.

The product of its digits is 120960, while the sum is 42.

The square root of 728561922 is about 26991.8862253085. The cubic root of 728561922 is about 899.8196848639.

The spelling of 728561922 in words is "seven hundred twenty-eight million, five hundred sixty-one thousand, nine hundred twenty-two".