256047867 has 24 divisors (see below), whose sum is σ = 375312080. Its totient is φ = 168194880.

The previous prime is 256047859. The next prime is 256047899. The reversal of 256047867 is 768740652.

256047867 is a `hidden beast` number, since 2 + 560 + 4 + 7 + 86 + 7 = 666.

It is not a de Polignac number, because 256047867 - 2³ = 256047859 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (256047767) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 206373 + ... + 207609.

Almost surely, 2^256047867 is an apocalyptic number.

256047867 is a deficient number, since it is larger than the sum of its proper divisors (119264213).

256047867 is a wasteful number, since it uses less digits than its factorization.

256047867 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1563 (or 1560 counting only the distinct ones).

The product of its (nonzero) digits is 564480, while the sum is 45.

The square root of 256047867 is about 16001.4957738331. The cubic root of 256047867 is about 634.9999933867. Note that the first 5 decimals are identical.

The spelling of 256047867 in words is "two hundred fifty-six million, forty-seven thousand, eight hundred sixty-seven".