255644 has 12 divisors (see below), whose sum is σ = 453600. Its totient is φ = 126048.

The previous prime is 255641. The next prime is 255649. The reversal of 255644 is 446552.

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 255644.

It is not an unprimeable number, because it can be changed into a prime (255641) 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 3 ways as a sum of consecutive naturals, for example, 89 + ... + 720.

It is an arithmetic number, because the mean of its divisors is an integer number (37800).

2²⁵⁵⁶⁴⁴ is an apocalyptic number.

It is an amenable number.

255644 is a deficient number, since it is larger than the sum of its proper divisors (197956).

255644 is a wasteful number, since it uses less digits than its factorization.

255644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 892 (or 890 counting only the distinct ones).

The product of its digits is 4800, while the sum is 26.

The square root of 255644 is about 505.6124998455. The cubic root of 255644 is about 63.4665953636.

The spelling of 255644 in words is "two hundred fifty-five thousand, six hundred forty-four".