256758 has 8 divisors (see below), whose sum is σ = 513528. Its totient is φ = 85584.

The previous prime is 256757. The next prime is 256771. The reversal of 256758 is 857652.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

256758 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256757) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21391 + ... + 21402.

It is an arithmetic number, because the mean of its divisors is an integer number (64191).

2²⁵⁶⁷⁵⁸ is an apocalyptic number.

256758 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

256758 is a wasteful number, since it uses less digits than its factorization.

256758 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42798.

The product of its digits is 16800, while the sum is 33.

The square root of 256758 is about 506.7129364838. The cubic root of 256758 is about 63.5586495977.

The spelling of 256758 in words is "two hundred fifty-six thousand, seven hundred fifty-eight".