722578 has 8 divisors (see below), whose sum is σ = 1107072. Its totient is φ = 353556.

The previous prime is 722563. The next prime is 722581. The reversal of 722578 is 875227.

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

722578 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, 3750 + ... + 3937.

It is an arithmetic number, because the mean of its divisors is an integer number (138384).

2⁷²²⁵⁷⁸ is an apocalyptic number.

722578 is a deficient number, since it is larger than the sum of its proper divisors (384494).

722578 is a wasteful number, since it uses less digits than its factorization.

722578 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7736.

The product of its digits is 7840, while the sum is 31.

The square root of 722578 is about 850.0458811147. The cubic root of 722578 is about 89.7349403016.

It can be divided in two parts, 722 and 578, that multiplied together give a square (417316 = 646²).

The spelling of 722578 in words is "seven hundred twenty-two thousand, five hundred seventy-eight".