728744 has 16 divisors (see below), whose sum is σ = 1386720. Its totient is φ = 358960.

The previous prime is 728743. The next prime is 728747. The reversal of 728744 is 447827.

728744 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 728744.

It is not an unprimeable number, because it can be changed into a prime (728743) 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, 74 + ... + 1209.

It is an arithmetic number, because the mean of its divisors is an integer number (86670).

2⁷²⁸⁷⁴⁴ is an apocalyptic number.

It is an amenable number.

728744 is a deficient number, since it is larger than the sum of its proper divisors (657976).

728744 is a wasteful number, since it uses less digits than its factorization.

728744 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1360 (or 1356 counting only the distinct ones).

The product of its digits is 12544, while the sum is 32.

The square root of 728744 is about 853.6650396965. The cubic root of 728744 is about 89.9894637872.

The spelling of 728744 in words is "seven hundred twenty-eight thousand, seven hundred forty-four".