256188 has 24 divisors (see below), whose sum is σ = 614992. Its totient is φ = 82944.

The previous prime is 256187. The next prime is 256189. The reversal of 256188 is 881652.

It is an interprime number because it is at equal distance from previous prime (256187) and next prime (256189).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256181) 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 7 ways as a sum of consecutive naturals, for example, 156 + ... + 732.

2²⁵⁶¹⁸⁸ is an apocalyptic number.

It is an amenable number.

256188 is an abundant number, since it is smaller than the sum of its proper divisors (358804).

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

256188 is a wasteful number, since it uses less digits than its factorization.

256188 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 621 (or 619 counting only the distinct ones).

The product of its digits is 3840, while the sum is 30.

The square root of 256188 is about 506.1501753432. The cubic root of 256188 is about 63.5115815774.

It can be divided in two parts, 256 and 188, that added together give a palindrome (444).

The spelling of 256188 in words is "two hundred fifty-six thousand, one hundred eighty-eight".