728398326 has 32 divisors (see below), whose sum is σ = 1535184000. Its totient is φ = 229763520.

The previous prime is 728398273. The next prime is 728398343. The reversal of 728398326 is 623893827.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 116541 + ... + 122631.

It is an arithmetic number, because the mean of its divisors is an integer number (47974500).

Almost surely, 2^728398326 is an apocalyptic number.

728398326 is an abundant number, since it is smaller than the sum of its proper divisors (806785674).

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

728398326 is a wasteful number, since it uses less digits than its factorization.

728398326 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7164.

The product of its digits is 870912, while the sum is 48.

The square root of 728398326 is about 26988.8555889278. The cubic root of 728398326 is about 899.7523293807.

The spelling of 728398326 in words is "seven hundred twenty-eight million, three hundred ninety-eight thousand, three hundred twenty-six".