256317682 has 8 divisors (see below), whose sum is σ = 384550956. Its totient is φ = 128134032.

The previous prime is 256317667. The next prime is 256317683. The reversal of 256317682 is 286713652.

It can be written as a sum of positive squares in 2 ways, for example, as 174794841 + 81522841 = 13221^2 + 9029^2 .

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 (256317683) 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, 5928 + ... + 23404.

Almost surely, 2^256317682 is an apocalyptic number.

256317682 is a deficient number, since it is larger than the sum of its proper divisors (128233274).

256317682 is a wasteful number, since it uses less digits than its factorization.

256317682 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24812.

The product of its digits is 120960, while the sum is 40.

The square root of 256317682 is about 16009.9244845190. The cubic root of 256317682 is about 635.2229626031. Note that the first 3 decimals are identical.

The spelling of 256317682 in words is "two hundred fifty-six million, three hundred seventeen thousand, six hundred eighty-two".