728628 has 12 divisors (see below), whose sum is σ = 1700160. Its totient is φ = 242872.

The previous prime is 728627. The next prime is 728639. The reversal of 728628 is 826827.

728628 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (728627) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 30348 + ... + 30371.

It is an arithmetic number, because the mean of its divisors is an integer number (141680).

2⁷²⁸⁶²⁸ is an apocalyptic number.

It is an amenable number.

728628 is an abundant number, since it is smaller than the sum of its proper divisors (971532).

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

728628 is a wasteful number, since it uses less digits than its factorization.

728628 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60726 (or 60724 counting only the distinct ones).

The product of its digits is 10752, while the sum is 33.

The square root of 728628 is about 853.5970946530. The cubic root of 728628 is about 89.9846887533.

The spelling of 728628 in words is "seven hundred twenty-eight thousand, six hundred twenty-eight".