728536 has 16 divisors (see below), whose sum is σ = 1438200. Its totient is φ = 345024.

The previous prime is 728527. The next prime is 728537. The reversal of 728536 is 635827.

It is an Ulam number.

It is a junction number, because it is equal to n+sod(n) for n = 728498 and 728507.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (728537) by changing a digit.

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, 2245 + ... + 2548.

2⁷²⁸⁵³⁶ is an apocalyptic number.

728536 is a gapful number since it is divisible by the number (76) formed by its first and last digit.

It is an amenable number.

728536 is a deficient number, since it is larger than the sum of its proper divisors (709664).

728536 is a wasteful number, since it uses less digits than its factorization.

728536 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4818 (or 4814 counting only the distinct ones).

The product of its digits is 10080, while the sum is 31.

The square root of 728536 is about 853.5432033588. The cubic root of 728536 is about 89.9809012972.

The spelling of 728536 in words is "seven hundred twenty-eight thousand, five hundred thirty-six".