722308 has 12 divisors (see below), whose sum is σ = 1270080. Its totient is φ = 359432.

The previous prime is 722299. The next prime is 722311. The reversal of 722308 is 803227.

It is a happy number.

It is an unprimeable number.

722308 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 (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1185 + ... + 1687.

It is an arithmetic number, because the mean of its divisors is an integer number (105840).

2⁷²²³⁰⁸ is an apocalyptic number.

It is an amenable number.

722308 is a deficient number, since it is larger than the sum of its proper divisors (547772).

722308 is a wasteful number, since it uses less digits than its factorization.

722308 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 866 (or 864 counting only the distinct ones).

The product of its (nonzero) digits is 672, while the sum is 22.

The square root of 722308 is about 849.8870513192. The cubic root of 722308 is about 89.7237620610.

It can be divided in two parts, 72 and 2308, that multiplied together give a triangular number (166176 = T₅₇₆).

The spelling of 722308 in words is "seven hundred twenty-two thousand, three hundred eight".