556388 has 24 divisors (see below), whose sum is σ = 1150464. Its totient is φ = 230400.

The previous prime is 556373. The next prime is 556399. The reversal of 556388 is 883655.

556388 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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, 548 + ... + 1188.

It is an arithmetic number, because the mean of its divisors is an integer number (47936).

2⁵⁵⁶³⁸⁸ is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 556388, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (575232).

556388 is an abundant number, since it is smaller than the sum of its proper divisors (594076).

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

556388 is a wasteful number, since it uses less digits than its factorization.

556388 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 683 (or 681 counting only the distinct ones).

The product of its digits is 28800, while the sum is 35.

The square root of 556388 is about 745.9142041817. The cubic root of 556388 is about 82.2481083443.

The spelling of 556388 in words is "five hundred fifty-six thousand, three hundred eighty-eight".