256336 has 20 divisors (see below), whose sum is σ = 511252. Its totient is φ = 124416.

The previous prime is 256313. The next prime is 256337. The reversal of 256336 is 633652.

256336 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 129600 + 126736 = 360^2 + 356^2 .

It is a nialpdrome in base 4.

It is a zygodrome in base 4.

It is a self number, because there is not a number n which added to its sum of digits gives 256336.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256337) by changing a digit.

256336 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, 376 + ... + 808.

2²⁵⁶³³⁶ is an apocalyptic number.

It is an amenable number.

256336 is a deficient number, since it is larger than the sum of its proper divisors (254916).

256336 is a wasteful number, since it uses less digits than its factorization.

256336 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 478 (or 472 counting only the distinct ones).

The product of its digits is 3240, while the sum is 25.

The square root of 256336 is about 506.2963559024. The cubic root of 256336 is about 63.5238094525.

Adding to 256336 its reverse (633652), we get a palindrome (889988).

The spelling of 256336 in words is "two hundred fifty-six thousand, three hundred thirty-six".