722528 has 24 divisors (see below), whose sum is σ = 1447992. Its totient is φ = 354816.

The previous prime is 722521. The next prime is 722537. The reversal of 722528 is 825227.

It is a junction number, because it is equal to n+sod(n) for n = 722497 and 722506.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (722521) by changing a digit.

722528 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, 1976 + ... + 2312.

It is an arithmetic number, because the mean of its divisors is an integer number (60333).

2⁷²²⁵²⁸ is an apocalyptic number.

It is an amenable number.

722528 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

722528 is a wasteful number, since it uses less digits than its factorization.

722528 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 414 (or 406 counting only the distinct ones).

The product of its digits is 2240, while the sum is 26.

The square root of 722528 is about 850.0164704287. The cubic root of 722528 is about 89.7328704671.

The spelling of 722528 in words is "seven hundred twenty-two thousand, five hundred twenty-eight".