256879845 has 24 divisors (see below), whose sum is σ = 452562552. Its totient is φ = 134755200.

The previous prime is 256879813. The next prime is 256879853. The reversal of 256879845 is 548978652.

256879845 is a `hidden beast` number, since 2 + 568 + 79 + 8 + 4 + 5 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 431649 + 256448196 = 657^2 + 16014^2 .

It is not a de Polignac number, because 256879845 - 2⁵ = 256879813 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 256879791 and 256879800.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 44046 + ... + 49535.

It is an arithmetic number, because the mean of its divisors is an integer number (18856773).

Almost surely, 2^256879845 is an apocalyptic number.

It is an amenable number.

256879845 is a deficient number, since it is larger than the sum of its proper divisors (195682707).

256879845 is a wasteful number, since it uses less digits than its factorization.

256879845 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 93653 (or 93650 counting only the distinct ones).

The product of its digits is 4838400, while the sum is 54.

The square root of 256879845 is about 16027.4715722724. The cubic root of 256879845 is about 635.6870196733.

The spelling of 256879845 in words is "two hundred fifty-six million, eight hundred seventy-nine thousand, eight hundred forty-five".