256244 has 18 divisors (see below), whose sum is σ = 473970. Its totient is φ = 121072.

The previous prime is 256219. The next prime is 256279. The reversal of 256244 is 442652.

Added to its reverse (442652) it gives a square (698896 = 836²).

It can be written as a sum of positive squares in only one way, i.e., 220900 + 35344 = 470^2 + 188^2 .

It is a congruent number.

It is an unprimeable number.

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 5 ways as a sum of consecutive naturals, for example, 5429 + ... + 5475.

2²⁵⁶²⁴⁴ is an apocalyptic number.

It is an amenable number.

256244 is a deficient number, since it is larger than the sum of its proper divisors (217726).

256244 is a wasteful number, since it uses less digits than its factorization.

256244 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 127 (or 78 counting only the distinct ones).

The product of its digits is 1920, while the sum is 23.

The square root of 256244 is about 506.2054918706. The cubic root of 256244 is about 63.5162088946.

Adding to 256244 its reverse (442652), we get a palindrome (698896).

The spelling of 256244 in words is "two hundred fifty-six thousand, two hundred forty-four".