256845674 has 8 divisors (see below), whose sum is σ = 388209888. Its totient is φ = 127442380.

The previous prime is 256845653. The next prime is 256845679. The reversal of 256845674 is 476548652.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (256845679) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 489902 + ... + 490425.

It is an arithmetic number, because the mean of its divisors is an integer number (48526236).

Almost surely, 2^256845674 is an apocalyptic number.

256845674 is a deficient number, since it is larger than the sum of its proper divisors (131364214).

256845674 is a wasteful number, since it uses less digits than its factorization.

256845674 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 980460.

The product of its digits is 1612800, while the sum is 47.

The square root of 256845674 is about 16026.4055233855. The cubic root of 256845674 is about 635.6588313655.

The spelling of 256845674 in words is "two hundred fifty-six million, eight hundred forty-five thousand, six hundred seventy-four".