728561930 has 32 divisors (see below), whose sum is σ = 1328140800. Its totient is φ = 287726400.

The previous prime is 728561917. The next prime is 728561947. The reversal of 728561930 is 39165827.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 372455 + ... + 374405.

It is an arithmetic number, because the mean of its divisors is an integer number (41504400).

Almost surely, 2^728561930 is an apocalyptic number.

728561930 is a deficient number, since it is larger than the sum of its proper divisors (599578870).

728561930 is a wasteful number, since it uses less digits than its factorization.

728561930 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2414.

The product of its (nonzero) digits is 90720, while the sum is 41.

The square root of 728561930 is about 26991.8863735012. The cubic root of 728561930 is about 899.8196881574.

The spelling of 728561930 in words is "seven hundred twenty-eight million, five hundred sixty-one thousand, nine hundred thirty".