556220 has 48 divisors (see below), whose sum is σ = 1391040. Its totient is φ = 182784.

The previous prime is 556219. The next prime is 556229. The reversal of 556220 is 22655.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 556192 and 556201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (556229) 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 15 ways as a sum of consecutive naturals, for example, 3992 + ... + 4128.

It is an arithmetic number, because the mean of its divisors is an integer number (28980).

2⁵⁵⁶²²⁰ 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 556220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (695520).

556220 is an abundant number, since it is smaller than the sum of its proper divisors (834820).

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

556220 is a wasteful number, since it uses less digits than its factorization.

556220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 182 (or 180 counting only the distinct ones).

The product of its (nonzero) digits is 600, while the sum is 20.

The square root of 556220 is about 745.8015821919. The cubic root of 556220 is about 82.2398293057.

Adding to 556220 its reverse (22655), we get a palindrome (578875).

The spelling of 556220 in words is "five hundred fifty-six thousand, two hundred twenty".