256736 has 24 divisors (see below), whose sum is σ = 517104. Its totient is φ = 125440.

The previous prime is 256723. The next prime is 256757. The reversal of 256736 is 637652.

It is a junction number, because it is equal to n+sod(n) for n = 256699 and 256708.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2216 + ... + 2328.

It is an arithmetic number, because the mean of its divisors is an integer number (21546).

2²⁵⁶⁷³⁶ is an apocalyptic number.

It is an amenable number.

256736 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.

256736 is a wasteful number, since it uses less digits than its factorization.

256736 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 194 (or 186 counting only the distinct ones).

The product of its digits is 7560, while the sum is 29.

The square root of 256736 is about 506.6912274749. The cubic root of 256736 is about 63.5568342304.

The spelling of 256736 in words is "two hundred fifty-six thousand, seven hundred thirty-six".