722856 has 16 divisors (see below), whose sum is σ = 1807200. Its totient is φ = 240944.

The previous prime is 722849. The next prime is 722881. The reversal of 722856 is 658227.

It is an unprimeable number.

722856 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15036 + ... + 15083.

It is an arithmetic number, because the mean of its divisors is an integer number (112950).

2⁷²²⁸⁵⁶ is an apocalyptic number.

It is an amenable number.

722856 is an abundant number, since it is smaller than the sum of its proper divisors (1084344).

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

722856 is a wasteful number, since it uses less digits than its factorization.

722856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30128 (or 30124 counting only the distinct ones).

The product of its digits is 6720, while the sum is 30.

The square root of 722856 is about 850.2093859750. The cubic root of 722856 is about 89.7464468401.

The spelling of 722856 in words is "seven hundred twenty-two thousand, eight hundred fifty-six".