256826366 has 4 divisors (see below), whose sum is σ = 385239552. Its totient is φ = 128413182.

The previous prime is 256826357. The next prime is 256826369. The reversal of 256826366 is 663628652.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256826369) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64206590 + ... + 64206593.

It is an arithmetic number, because the mean of its divisors is an integer number (96309888).

Almost surely, 2^256826366 is an apocalyptic number.

256826366 is a deficient number, since it is larger than the sum of its proper divisors (128413186).

256826366 is a wasteful number, since it uses less digits than its factorization.

256826366 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 128413185.

The product of its digits is 622080, while the sum is 44.

The square root of 256826366 is about 16025.8031312006. The cubic root of 256826366 is about 635.6429027236.

The spelling of 256826366 in words is "two hundred fifty-six million, eight hundred twenty-six thousand, three hundred sixty-six".