256834 has 8 divisors (see below), whose sum is σ = 387468. Its totient is φ = 127680.

The previous prime is 256831. The next prime is 256873. The reversal of 256834 is 438652.

It can be written as a sum of positive squares in 2 ways, for example, as 235225 + 21609 = 485^2 + 147^2 .

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

It is a d-powerful number, because it can be written as 2 + 5⁷ + 8 + 6⁴ + 3¹¹ + 4⁴ .

It is not an unprimeable number, because it can be changed into a prime (256831) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 334 + ... + 790.

2²⁵⁶⁸³⁴ is an apocalyptic number.

256834 is a deficient number, since it is larger than the sum of its proper divisors (130634).

256834 is a wasteful number, since it uses less digits than its factorization.

256834 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 740.

The product of its digits is 5760, while the sum is 28.

The square root of 256834 is about 506.7879240866. The cubic root of 256834 is about 63.5649200688.

It can be divided in two parts, 25 and 6834, that added together give a cube (6859 = 19³).

The spelling of 256834 in words is "two hundred fifty-six thousand, eight hundred thirty-four".