256773 has 16 divisors (see below), whose sum is σ = 387072. Its totient is φ = 150000.

The previous prime is 256771. The next prime is 256799. The reversal of 256773 is 377652.

It is not a de Polignac number, because 256773 - 2¹ = 256771 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 256773.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256771) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 898 + ... + 1148.

It is an arithmetic number, because the mean of its divisors is an integer number (24192).

2²⁵⁶⁷⁷³ is an apocalyptic number.

It is an amenable number.

256773 is a deficient number, since it is larger than the sum of its proper divisors (130299).

256773 is a wasteful number, since it uses less digits than its factorization.

256773 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 296.

The product of its digits is 8820, while the sum is 30.

The square root of 256773 is about 506.7277375475. The cubic root of 256773 is about 63.5598872887.

The spelling of 256773 in words is "two hundred fifty-six thousand, seven hundred seventy-three".