555856 has 30 divisors (see below), whose sum is σ = 1254570. Its totient is φ = 237888.

The previous prime is 555853. The next prime is 555857. The reversal of 555856 is 658555.

It can be written as a sum of positive squares in only one way, i.e., 379456 + 176400 = 616^2 + 420^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (555853) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 430 + ... + 1138.

It is an arithmetic number, because the mean of its divisors is an integer number (41819).

2⁵⁵⁵⁸⁵⁶ is an apocalyptic number.

555856 is a gapful number since it is divisible by the number (56) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 555856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (627285).

555856 is an abundant number, since it is smaller than the sum of its proper divisors (698714).

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

555856 is a wasteful number, since it uses less digits than its factorization.

555856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 731 (or 718 counting only the distinct ones).

The product of its digits is 30000, while the sum is 34.

The square root of 555856 is about 745.5575095189. The cubic root of 555856 is about 82.2218856681.

The spelling of 555856 in words is "five hundred fifty-five thousand, eight hundred fifty-six".