728907322 has 16 divisors (see below), whose sum is σ = 1284508512. Its totient is φ = 305835120.

The previous prime is 728907313. The next prime is 728907323. The reversal of 728907322 is 223709827.

It is not an unprimeable number, because it can be changed into a prime (728907323) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1274028 + ... + 1274599.

It is an arithmetic number, because the mean of its divisors is an integer number (80281782).

Almost surely, 2^728907322 is an apocalyptic number.

728907322 is a deficient number, since it is larger than the sum of its proper divisors (555601190).

728907322 is a wasteful number, since it uses less digits than its factorization.

728907322 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2548653.

The product of its (nonzero) digits is 84672, while the sum is 40.

The square root of 728907322 is about 26998.2836861901. The cubic root of 728907322 is about 899.9618592890.

The spelling of 728907322 in words is "seven hundred twenty-eight million, nine hundred seven thousand, three hundred twenty-two".