722810865 has 32 divisors (see below), whose sum is σ = 1352457216. Its totient is φ = 322741440.

The previous prime is 722810861. The next prime is 722810897. The reversal of 722810865 is 568018227.

It is not a de Polignac number, because 722810865 - 2² = 722810861 is a prime.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (722810861) 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 31 ways as a sum of consecutive naturals, for example, 75531 + ... + 84560.

It is an arithmetic number, because the mean of its divisors is an integer number (42264288).

Almost surely, 2^722810865 is an apocalyptic number.

It is an amenable number.

722810865 is a deficient number, since it is larger than the sum of its proper divisors (629646351).

722810865 is a wasteful number, since it uses less digits than its factorization.

722810865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 160149.

The product of its (nonzero) digits is 53760, while the sum is 39.

The square root of 722810865 is about 26885.1420862900. The cubic root of 722810865 is about 897.4457888387.

The spelling of 722810865 in words is "seven hundred twenty-two million, eight hundred ten thousand, eight hundred sixty-five".