722589 has 16 divisors (see below), whose sum is σ = 1159680. Its totient is φ = 390960.

The previous prime is 722581. The next prime is 722599. The reversal of 722589 is 985227.

722589 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 722589 - 2³ = 722581 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (722581) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 507 + ... + 1304.

It is an arithmetic number, because the mean of its divisors is an integer number (72480).

2⁷²²⁵⁸⁹ is an apocalyptic number.

It is an amenable number.

722589 is a deficient number, since it is larger than the sum of its proper divisors (437091).

722589 is a wasteful number, since it uses less digits than its factorization.

722589 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1840.

The product of its digits is 10080, while the sum is 33.

The square root of 722589 is about 850.0523513290. The cubic root of 722589 is about 89.7353956523.

The spelling of 722589 in words is "seven hundred twenty-two thousand, five hundred eighty-nine".