728544 has 24 divisors (see below), whose sum is σ = 1912680. Its totient is φ = 242816.

The previous prime is 728537. The next prime is 728551. The reversal of 728544 is 445827.

728544 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (728537) and next prime (728551).

It is a tau number, because it is divible by the number of its divisors (24).

It is a congruent number.

It is an unprimeable number.

728544 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, 3699 + ... + 3890.

It is an arithmetic number, because the mean of its divisors is an integer number (79695).

2⁷²⁸⁵⁴⁴ is an apocalyptic number.

It is an amenable number.

728544 is an abundant number, since it is smaller than the sum of its proper divisors (1184136).

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

728544 is a wasteful number, since it uses less digits than its factorization.

728544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7602 (or 7594 counting only the distinct ones).

The product of its digits is 8960, while the sum is 30.

The square root of 728544 is about 853.5478896934. The cubic root of 728544 is about 89.9812306539.

The spelling of 728544 in words is "seven hundred twenty-eight thousand, five hundred forty-four".