556386 has 16 divisors (see below), whose sum is σ = 1137024. Its totient is φ = 181424.

The previous prime is 556373. The next prime is 556399. The reversal of 556386 is 683655.

556386 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (556373) and next prime (556399).

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, 705 + ... + 1268.

It is an arithmetic number, because the mean of its divisors is an integer number (71064).

2⁵⁵⁶³⁸⁶ is an apocalyptic number.

556386 is an abundant number, since it is smaller than the sum of its proper divisors (580638).

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

556386 is a wasteful number, since it uses less digits than its factorization.

556386 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2025.

The product of its digits is 21600, while the sum is 33.

The square root of 556386 is about 745.9128635437. The cubic root of 556386 is about 82.2480097941.

It can be divided in two parts, 55 and 6386, that added together give a triangular number (6441 = T₁₁₃).

The spelling of 556386 in words is "five hundred fifty-six thousand, three hundred eighty-six".