318985 has 8 divisors (see below), whose sum is σ = 386496. Its totient is φ = 252720.

The previous prime is 318979. The next prime is 319001. The reversal of 318985 is 589813.

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

It is not a de Polignac number, because 318985 - 2⁹ = 318473 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 318985.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 318985.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 412 + ... + 898.

It is an arithmetic number, because the mean of its divisors is an integer number (48312).

2³¹⁸⁹⁸⁵ is an apocalyptic number.

It is an amenable number.

318985 is a deficient number, since it is larger than the sum of its proper divisors (67511).

318985 is a wasteful number, since it uses less digits than its factorization.

318985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 623.

The product of its digits is 8640, while the sum is 34.

The square root of 318985 is about 564.7875706848. The cubic root of 318985 is about 68.3266435384.

The spelling of 318985 in words is "three hundred eighteen thousand, nine hundred eighty-five".