256823226 has 36 divisors (see below), whose sum is σ = 611640666. Its totient is φ = 77824560.

The previous prime is 256823207. The next prime is 256823227. The reversal of 256823226 is 622328652.

256823226 is a `hidden beast` number, since 256 + 82 + 322 + 6 = 666.

It can be written as a sum of positive squares in only one way, i.e., 223472601 + 33350625 = 14949^2 + 5775^2 .

It is not an unprimeable number, because it can be changed into a prime (256823227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 56781 + ... + 61136.

Almost surely, 2^256823226 is an apocalyptic number.

256823226 is an abundant number, since it is smaller than the sum of its proper divisors (354817440).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

256823226 is a wasteful number, since it uses less digits than its factorization.

256823226 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 117947 (or 117933 counting only the distinct ones).

The product of its digits is 69120, while the sum is 36.

The square root of 256823226 is about 16025.7051638922. The cubic root of 256823226 is about 635.6403122227.

It can be divided in two parts, 256823 and 226, that added together give a square (257049 = 507²).

The spelling of 256823226 in words is "two hundred fifty-six million, eight hundred twenty-three thousand, two hundred twenty-six".