256768678 has 16 divisors (see below), whose sum is σ = 396063360. Its totient is φ = 124756416.

The previous prime is 256768637. The next prime is 256768747. The reversal of 256768678 is 876867652.

256768678 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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, 74763 + ... + 78121.

It is an arithmetic number, because the mean of its divisors is an integer number (24753960).

Almost surely, 2^256768678 is an apocalyptic number.

256768678 is a deficient number, since it is larger than the sum of its proper divisors (139294682).

256768678 is a wasteful number, since it uses less digits than its factorization.

256768678 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4431.

The product of its digits is 6773760, while the sum is 55.

The square root of 256768678 is about 16024.0031827256. The cubic root of 256768678 is about 635.5953067360.

The spelling of 256768678 in words is "two hundred fifty-six million, seven hundred sixty-eight thousand, six hundred seventy-eight".