256279743 has 24 divisors (see below), whose sum is σ = 392771808. Its totient is φ = 160468992.

The previous prime is 256279739. The next prime is 256279753. The reversal of 256279743 is 347972652.

It is not a de Polignac number, because 256279743 - 2² = 256279739 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256279753) 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, 86830 + ... + 89732.

It is an arithmetic number, because the mean of its divisors is an integer number (16365492).

Almost surely, 2^256279743 is an apocalyptic number.

256279743 is a deficient number, since it is larger than the sum of its proper divisors (136492065).

256279743 is a wasteful number, since it uses less digits than its factorization.

256279743 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3503 (or 3500 counting only the distinct ones).

The product of its digits is 635040, while the sum is 45.

The square root of 256279743 is about 16008.7395818659. The cubic root of 256279743 is about 635.1916201002.

The spelling of 256279743 in words is "two hundred fifty-six million, two hundred seventy-nine thousand, seven hundred forty-three".