318008985 has 32 divisors (see below), whose sum is σ = 612111360. Its totient is φ = 137723328.

The previous prime is 318008981. The next prime is 318008989. The reversal of 318008985 is 589800813.

It is an interprime number because it is at equal distance from previous prime (318008981) and next prime (318008989).

It is not a de Polignac number, because 318008985 - 2² = 318008981 is a prime.

It is a super-2 number, since 2×318008985² = 202259429081460450, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (318008981) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 77707 + ... + 81696.

It is an arithmetic number, because the mean of its divisors is an integer number (19128480).

Almost surely, 2^318008985 is an apocalyptic number.

318008985 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

It is an amenable number.

318008985 is a deficient number, since it is larger than the sum of its proper divisors (294102375).

318008985 is a wasteful number, since it uses less digits than its factorization.

318008985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 159437.

The product of its (nonzero) digits is 69120, while the sum is 42.

The square root of 318008985 is about 17832.8064252377. The cubic root of 318008985 is about 682.5688481312.

The spelling of 318008985 in words is "three hundred eighteen million, eight thousand, nine hundred eighty-five".