556728 has 16 divisors (see below), whose sum is σ = 1391880. Its totient is φ = 185568.

The previous prime is 556727. The next prime is 556741. The reversal of 556728 is 827655.

It is a happy number.

556728 is nontrivially palindromic in base 7.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (556723) 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, 11575 + ... + 11622.

2⁵⁵⁶⁷²⁸ is an apocalyptic number.

It is an amenable number.

556728 is an abundant number, since it is smaller than the sum of its proper divisors (835152).

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

556728 is a wasteful number, since it uses less digits than its factorization.

556728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23206 (or 23202 counting only the distinct ones).

The product of its digits is 16800, while the sum is 33.

The square root of 556728 is about 746.1420776233. The cubic root of 556728 is about 82.2648584435.

The spelling of 556728 in words is "five hundred fifty-six thousand, seven hundred twenty-eight".