722928 has 20 divisors (see below), whose sum is σ = 1867688. Its totient is φ = 240960.

The previous prime is 722921. The next prime is 722933. The reversal of 722928 is 829227.

722928 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 722895 and 722904.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (722921) by changing a digit.

722928 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, 7483 + ... + 7578.

2⁷²²⁹²⁸ is an apocalyptic number.

It is an amenable number.

722928 is an abundant number, since it is smaller than the sum of its proper divisors (1144760).

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

722928 is a wasteful number, since it uses less digits than its factorization.

722928 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15072 (or 15066 counting only the distinct ones).

The product of its digits is 4032, while the sum is 30.

The square root of 722928 is about 850.2517274314. The cubic root of 722928 is about 89.7494264699.

The spelling of 722928 in words is "seven hundred twenty-two thousand, nine hundred twenty-eight".