722806 has 16 divisors (see below), whose sum is σ = 1312416. Its totient is φ = 291456.

The previous prime is 722797. The next prime is 722807. The reversal of 722806 is 608227.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (722807) by changing a digit.

722806 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1281 + ... + 1756.

It is an arithmetic number, because the mean of its divisors is an integer number (82026).

2⁷²²⁸⁰⁶ is an apocalyptic number.

722806 is a deficient number, since it is larger than the sum of its proper divisors (589610).

722806 is a wasteful number, since it uses less digits than its factorization.

722806 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3063.

The product of its (nonzero) digits is 1344, while the sum is 25.

The square root of 722806 is about 850.1799809452. The cubic root of 722806 is about 89.7443775364.

The spelling of 722806 in words is "seven hundred twenty-two thousand, eight hundred six".