256384695 has 16 divisors (see below), whose sum is σ = 468817920. Its totient is φ = 117204384.

The previous prime is 256384693. The next prime is 256384697. The reversal of 256384695 is 596483652.

It is an interprime number because it is at equal distance from previous prime (256384693) and next prime (256384697).

It is not a de Polignac number, because 256384695 - 2¹ = 256384693 is a prime.

It is a super-2 number, since 2×256384695² = 131466223660486050, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256384693) 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, 1220775 + ... + 1220984.

It is an arithmetic number, because the mean of its divisors is an integer number (29301120).

Almost surely, 2^256384695 is an apocalyptic number.

256384695 is a deficient number, since it is larger than the sum of its proper divisors (212433225).

256384695 is a wasteful number, since it uses less digits than its factorization.

256384695 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2441774.

The product of its digits is 1555200, while the sum is 48.

The square root of 256384695 is about 16012.0172058364. The cubic root of 256384695 is about 635.2783164214.

The spelling of 256384695 in words is "two hundred fifty-six million, three hundred eighty-four thousand, six hundred ninety-five".