318438866 has 8 divisors (see below), whose sum is σ = 505755900. Its totient is φ = 149853568.

The previous prime is 318438833. The next prime is 318438889. The reversal of 318438866 is 668834813.

It can be written as a sum of positive squares in 2 ways, for example, as 301751641 + 16687225 = 17371^2 + 4085^2 .

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

It is a super-2 number, since 2×318438866² = 202806622758731912, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 318438866.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 4682891 + ... + 4682958.

Almost surely, 2^318438866 is an apocalyptic number.

318438866 is a deficient number, since it is larger than the sum of its proper divisors (187317034).

318438866 is a wasteful number, since it uses less digits than its factorization.

318438866 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9365868.

The product of its digits is 663552, while the sum is 47.

The square root of 318438866 is about 17844.8554491203. The cubic root of 318438866 is about 682.8762726344.

The spelling of 318438866 in words is "three hundred eighteen million, four hundred thirty-eight thousand, eight hundred sixty-six".