256556228 has 12 divisors (see below), whose sum is σ = 455297472. Its totient is φ = 126471240.

The previous prime is 256556227. The next prime is 256556263. The reversal of 256556228 is 822655652.

It is not an unprimeable number, because it can be changed into a prime (256556227) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 451400 + ... + 451967.

It is an arithmetic number, because the mean of its divisors is an integer number (37941456).

Almost surely, 2^256556228 is an apocalyptic number.

It is an amenable number.

256556228 is a deficient number, since it is larger than the sum of its proper divisors (198741244).

256556228 is a wasteful number, since it uses less digits than its factorization.

256556228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 903442 (or 903440 counting only the distinct ones).

The product of its digits is 288000, while the sum is 41.

The square root of 256556228 is about 16017.3726934226. The cubic root of 256556228 is about 635.4199615149.

The spelling of 256556228 in words is "two hundred fifty-six million, five hundred fifty-six thousand, two hundred twenty-eight".