256318887 has 8 divisors (see below), whose sum is σ = 372827520. Its totient is φ = 155344760.

The previous prime is 256318883. The next prime is 256318901. The reversal of 256318887 is 788813652.

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

It is a cyclic number.

It is not a de Polignac number, because 256318887 - 2² = 256318883 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256318883) 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 7 ways as a sum of consecutive naturals, for example, 3883587 + ... + 3883652.

It is an arithmetic number, because the mean of its divisors is an integer number (46603440).

Almost surely, 2^256318887 is an apocalyptic number.

256318887 is a deficient number, since it is larger than the sum of its proper divisors (116508633).

256318887 is a wasteful number, since it uses less digits than its factorization.

256318887 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7767253.

The product of its digits is 645120, while the sum is 48.

The square root of 256318887 is about 16009.9621173818. The cubic root of 256318887 is about 635.2239580377.

The spelling of 256318887 in words is "two hundred fifty-six million, three hundred eighteen thousand, eight hundred eighty-seven".