256377 has 16 divisors (see below), whose sum is σ = 395712. Its totient is φ = 145920.

The previous prime is 256369. The next prime is 256391. The reversal of 256377 is 773652.

It is not a de Polignac number, because 256377 - 2³ = 256369 is a prime.

It is a super-2 number, since 2×256377² = 131458332258, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (256307) 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, 333 + ... + 789.

It is an arithmetic number, because the mean of its divisors is an integer number (24732).

2²⁵⁶³⁷⁷ is an apocalyptic number.

It is an amenable number.

256377 is a deficient number, since it is larger than the sum of its proper divisors (139335).

256377 is a wasteful number, since it uses less digits than its factorization.

256377 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 488.

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

The square root of 256377 is about 506.3368444030. The cubic root of 256377 is about 63.5271960718.

The spelling of 256377 in words is "two hundred fifty-six thousand, three hundred seventy-seven".