256292847 has 6 divisors (see below), whose sum is σ = 370200792. Its totient is φ = 170861892.

The previous prime is 256292831. The next prime is 256292849. The reversal of 256292847 is 748292652.

256292847 is a `hidden beast` number, since 2 + 562 + 9 + 2 + 84 + 7 = 666.

It is not a de Polignac number, because 256292847 - 2⁴ = 256292831 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256292849) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 14238483 + ... + 14238500.

It is an arithmetic number, because the mean of its divisors is an integer number (61700132).

Almost surely, 2^256292847 is an apocalyptic number.

256292847 is a deficient number, since it is larger than the sum of its proper divisors (113907945).

256292847 is a wasteful number, since it uses less digits than its factorization.

256292847 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28476989 (or 28476986 counting only the distinct ones).

The product of its digits is 483840, while the sum is 45.

The square root of 256292847 is about 16009.1488530777. The cubic root of 256292847 is about 635.2024460425.

The spelling of 256292847 in words is "two hundred fifty-six million, two hundred ninety-two thousand, eight hundred forty-seven".