256022668 has 12 divisors (see below), whose sum is σ = 488770632. Its totient is φ = 116373920.

The previous prime is 256022639. The next prime is 256022693. The reversal of 256022668 is 866220652.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2909305 + ... + 2909392.

It is an arithmetic number, because the mean of its divisors is an integer number (40730886).

Almost surely, 2^256022668 is an apocalyptic number.

It is an amenable number.

256022668 is a deficient number, since it is larger than the sum of its proper divisors (232747964).

256022668 is a wasteful number, since it uses less digits than its factorization.

256022668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5818712 (or 5818710 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 37.

The square root of 256022668 is about 16000.7083593196. The cubic root of 256022668 is about 634.9791614878.

The spelling of 256022668 in words is "two hundred fifty-six million, twenty-two thousand, six hundred sixty-eight".