556340 has 12 divisors (see below), whose sum is σ = 1168356. Its totient is φ = 222528.

The previous prime is 556331. The next prime is 556343. The reversal of 556340 is 43655.

556340 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 256036 + 300304 = 506^2 + 548^2 .

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 556340.

It is not an unprimeable number, because it can be changed into a prime (556343) by changing a digit.

556340 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13889 + ... + 13928.

It is an arithmetic number, because the mean of its divisors is an integer number (97363).

2⁵⁵⁶³⁴⁰ is an apocalyptic number.

It is an amenable number.

556340 is an abundant number, since it is smaller than the sum of its proper divisors (612016).

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

556340 is a wasteful number, since it uses less digits than its factorization.

556340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27826 (or 27824 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 23.

The square root of 556340 is about 745.8820282055. The cubic root of 556340 is about 82.2457430747.

Adding to 556340 its reverse (43655), we get a palindrome (599995).

The spelling of 556340 in words is "five hundred fifty-six thousand, three hundred forty".