722756 has 12 divisors (see below), whose sum is σ = 1278060. Its totient is φ = 357600.

The previous prime is 722749. The next prime is 722783. The reversal of 722756 is 657227.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 688900 + 33856 = 830^2 + 184^2 .

It is a hoax number, since the sum of its digits (29) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

722756 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, 491 + ... + 1298.

It is an arithmetic number, because the mean of its divisors is an integer number (106505).

2⁷²²⁷⁵⁶ is an apocalyptic number.

It is an amenable number.

722756 is a deficient number, since it is larger than the sum of its proper divisors (555304).

722756 is a wasteful number, since it uses less digits than its factorization.

722756 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1894 (or 1892 counting only the distinct ones).

The product of its digits is 5880, while the sum is 29.

The square root of 722756 is about 850.1505748984. The cubic root of 722756 is about 89.7423081373.

The spelling of 722756 in words is "seven hundred twenty-two thousand, seven hundred fifty-six".