728586 has 24 divisors (see below), whose sum is σ = 1672164. Its totient is φ = 228480.

The previous prime is 728579. The next prime is 728627. The reversal of 728586 is 685827.

728586 is a `hidden beast` number, since 72 + 8 + 586 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 690561 + 38025 = 831^2 + 195^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 728586.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 885 + ... + 1496.

2⁷²⁸⁵⁸⁶ is an apocalyptic number.

728586 is an abundant number, since it is smaller than the sum of its proper divisors (943578).

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

728586 is a wasteful number, since it uses less digits than its factorization.

728586 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2406 (or 2403 counting only the distinct ones).

The product of its digits is 26880, while the sum is 36.

The square root of 728586 is about 853.5724925277. The cubic root of 728586 is about 89.9829597368.

The spelling of 728586 in words is "seven hundred twenty-eight thousand, five hundred eighty-six".