728504 has 16 divisors (see below), whose sum is σ = 1561200. Its totient is φ = 312192.

The previous prime is 728489. The next prime is 728521. The reversal of 728504 is 405827.

It is a Smith number, since the sum of its digits (26) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

728504 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6449 + ... + 6560.

It is an arithmetic number, because the mean of its divisors is an integer number (97575).

2⁷²⁸⁵⁰⁴ is an apocalyptic number.

It is an amenable number.

728504 is an abundant number, since it is smaller than the sum of its proper divisors (832696).

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

728504 is a wasteful number, since it uses less digits than its factorization.

728504 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13022 (or 13018 counting only the distinct ones).

The product of its (nonzero) digits is 2240, while the sum is 26.

The square root of 728504 is about 853.5244577632. The cubic root of 728504 is about 89.9795838464.

The spelling of 728504 in words is "seven hundred twenty-eight thousand, five hundred four".