256383 has 12 divisors (see below), whose sum is σ = 377208. Its totient is φ = 167760.

The previous prime is 256369. The next prime is 256391. The reversal of 256383 is 383652.

256383 is a `hidden beast` number, since 25 + 638 + 3 = 666.

It is not a de Polignac number, because 256383 - 2¹⁴ = 239999 is a prime.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a d-powerful number, because it can be written as 2⁹ + 5⁷ + 3⁴ + 6 + 8³ + 3¹¹ .

It is an alternating number because its digits alternate between even and odd.

It is a zygodrome in base 4.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256313) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 316 + ... + 782.

It is an arithmetic number, because the mean of its divisors is an integer number (31434).

2²⁵⁶³⁸³ is an apocalyptic number.

256383 is a deficient number, since it is larger than the sum of its proper divisors (120825).

256383 is a wasteful number, since it uses less digits than its factorization.

256383 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 534 (or 531 counting only the distinct ones).

The product of its digits is 4320, while the sum is 27.

The square root of 256383 is about 506.3427692779. The cubic root of 256383 is about 63.5276916443.

The spelling of 256383 in words is "two hundred fifty-six thousand, three hundred eighty-three".