725628 has 24 divisors (see below), whose sum is σ = 1793232. Its totient is φ = 227584.

The previous prime is 725603. The next prime is 725639. The reversal of 725628 is 826527.

725628 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 = 725595 and 725604.

It is a congruent number.

It is an unprimeable number.

725628 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 7 ways as a sum of consecutive naturals, for example, 1575 + ... + 1982.

It is an arithmetic number, because the mean of its divisors is an integer number (74718).

2⁷²⁵⁶²⁸ is an apocalyptic number.

It is an amenable number.

725628 is an abundant number, since it is smaller than the sum of its proper divisors (1067604).

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

725628 is a wasteful number, since it uses less digits than its factorization.

725628 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3581 (or 3579 counting only the distinct ones).

The product of its digits is 6720, while the sum is 30.

The square root of 725628 is about 851.8380127700. The cubic root of 725628 is about 89.8610200626.

The spelling of 725628 in words is "seven hundred twenty-five thousand, six hundred twenty-eight".