256034866 has 16 divisors (see below), whose sum is σ = 391327200. Its totient is φ = 125601088.

The previous prime is 256034839. The next prime is 256034869. The reversal of 256034866 is 668430652.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (256034869) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 68145 + ... + 71803.

It is an arithmetic number, because the mean of its divisors is an integer number (24457950).

Almost surely, 2^256034866 is an apocalyptic number.

256034866 is a deficient number, since it is larger than the sum of its proper divisors (135292334).

256034866 is a wasteful number, since it uses less digits than its factorization.

256034866 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4313.

The product of its (nonzero) digits is 207360, while the sum is 40.

The square root of 256034866 is about 16001.0895254042. The cubic root of 256034866 is about 634.9892456897.

The spelling of 256034866 in words is "two hundred fifty-six million, thirty-four thousand, eight hundred sixty-six".