256243476 has 24 divisors (see below), whose sum is σ = 598328640. Its totient is φ = 85353472.

The previous prime is 256243459. The next prime is 256243487. The reversal of 256243476 is 674342652.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11860 + ... + 25556.

It is an arithmetic number, because the mean of its divisors is an integer number (24930360).

Almost surely, 2^256243476 is an apocalyptic number.

It is an amenable number.

256243476 is an abundant number, since it is smaller than the sum of its proper divisors (342085164).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

256243476 is a wasteful number, since it uses less digits than its factorization.

256243476 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15263 (or 15261 counting only the distinct ones).

The product of its digits is 241920, while the sum is 39.

The square root of 256243476 is about 16007.6068167606. The cubic root of 256243476 is about 635.1616559928.

The spelling of 256243476 in words is "two hundred fifty-six million, two hundred forty-three thousand, four hundred seventy-six".