722268 has 18 divisors (see below), whose sum is σ = 1825824. Its totient is φ = 240744.

The previous prime is 722257. The next prime is 722273. The reversal of 722268 is 862227.

It is a tau number, because it is divible by the number of its divisors (18).

It is an Ulam number.

It is a congruent number.

It is an unprimeable number.

722268 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 5 ways as a sum of consecutive naturals, for example, 9996 + ... + 10067.

2⁷²²²⁶⁸ is an apocalyptic number.

It is an amenable number.

722268 is an abundant number, since it is smaller than the sum of its proper divisors (1103556).

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

722268 is a wasteful number, since it uses less digits than its factorization.

722268 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20073 (or 20068 counting only the distinct ones).

The product of its digits is 2688, while the sum is 27.

The square root of 722268 is about 849.8635184546. The cubic root of 722268 is about 89.7221057884.

It can be divided in two parts, 722 and 268, that added together give a triangular number (990 = T₄₄).

The spelling of 722268 in words is "seven hundred twenty-two thousand, two hundred sixty-eight".