728809530 has 32 divisors (see below), whose sum is σ = 1749855744. Its totient is φ = 194270016.

The previous prime is 728809513. The next prime is 728809531. The reversal of 728809530 is 35908827.

It is not an unprimeable number, because it can be changed into a prime (728809531) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 132087 + ... + 137493.

It is an arithmetic number, because the mean of its divisors is an integer number (54682992).

Almost surely, 2^728809530 is an apocalyptic number.

728809530 is an abundant number, since it is smaller than the sum of its proper divisors (1021046214).

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

728809530 is a wasteful number, since it uses less digits than its factorization.

728809530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9910.

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

The square root of 728809530 is about 26996.4725473533. The cubic root of 728809530 is about 899.9216104565.

The spelling of 728809530 in words is "seven hundred twenty-eight million, eight hundred nine thousand, five hundred thirty".