256945269 has 24 divisors (see below), whose sum is σ = 399213408. Its totient is φ = 146573280.

The previous prime is 256945229. The next prime is 256945277. The reversal of 256945269 is 962549652.

It is not a de Polignac number, because 256945269 - 2⁹ = 256944757 is a prime.

It is a super-2 number, since 2×256945269² = 132041742522964722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256945229) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 114579 + ... + 116799.

It is an arithmetic number, because the mean of its divisors is an integer number (16633892).

Almost surely, 2^256945269 is an apocalyptic number.

It is an amenable number.

256945269 is a deficient number, since it is larger than the sum of its proper divisors (142268139).

256945269 is a wasteful number, since it uses less digits than its factorization.

256945269 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3025 (or 3018 counting only the distinct ones).

The product of its digits is 1166400, while the sum is 48.

The square root of 256945269 is about 16029.5124380001. The cubic root of 256945269 is about 635.7409822011.

The spelling of 256945269 in words is "two hundred fifty-six million, nine hundred forty-five thousand, two hundred sixty-nine".