318623985 has 24 divisors (see below), whose sum is σ = 559278720. Its totient is φ = 167779872.

The previous prime is 318623971. The next prime is 318623989. The reversal of 318623985 is 589326813.

It is a happy number.

318623985 is a `hidden beast` number, since 3 + 18 + 623 + 9 + 8 + 5 = 666.

It is not a de Polignac number, because 318623985 - 2¹⁰ = 318622961 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 318623985.

It is not an unprimeable number, because it can be changed into a prime (318623989) 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 23 ways as a sum of consecutive naturals, for example, 41259 + ... + 48368.

It is an arithmetic number, because the mean of its divisors is an integer number (23303280).

Almost surely, 2^318623985 is an apocalyptic number.

It is an amenable number.

318623985 is a deficient number, since it is larger than the sum of its proper divisors (240654735).

318623985 is a wasteful number, since it uses less digits than its factorization.

318623985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89717 (or 89714 counting only the distinct ones).

The product of its digits is 311040, while the sum is 45.

The square root of 318623985 is about 17850.0415965902. The cubic root of 318623985 is about 683.0085731564.

The spelling of 318623985 in words is "three hundred eighteen million, six hundred twenty-three thousand, nine hundred eighty-five".