728824 has 32 divisors (see below), whose sum is σ = 1516320. Its totient is φ = 326656.

The previous prime is 728813. The next prime is 728831. The reversal of 728824 is 428827.

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, 3012 + ... + 3244.

It is an arithmetic number, because the mean of its divisors is an integer number (47385).

2⁷²⁸⁸²⁴ is an apocalyptic number.

It is an amenable number.

728824 is an abundant number, since it is smaller than the sum of its proper divisors (787496).

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

728824 is a wasteful number, since it uses less digits than its factorization.

728824 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 279 (or 275 counting only the distinct ones).

The product of its digits is 7168, while the sum is 31.

The square root of 728824 is about 853.7118951965. The cubic root of 728824 is about 89.9927566187.

The spelling of 728824 in words is "seven hundred twenty-eight thousand, eight hundred twenty-four".