728764 has 24 divisors (see below), whose sum is σ = 1379840. Its totient is φ = 335664.

The previous prime is 728747. The next prime is 728771. The reversal of 728764 is 467827.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3157 + ... + 3379.

2⁷²⁸⁷⁶⁴ is an apocalyptic number.

It is an amenable number.

728764 is a deficient number, since it is larger than the sum of its proper divisors (651076).

728764 is a wasteful number, since it uses less digits than its factorization.

728764 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 289 (or 287 counting only the distinct ones).

The product of its digits is 18816, while the sum is 34.

The square root of 728764 is about 853.6767538126. The cubic root of 728764 is about 89.9902870176.

It can be divided in two parts, 72 and 8764, that added together give a square (8836 = 94²).

The spelling of 728764 in words is "seven hundred twenty-eight thousand, seven hundred sixty-four".