318986 has 8 divisors (see below), whose sum is σ = 480900. Its totient is φ = 158688.

The previous prime is 318979. The next prime is 319001. The reversal of 318986 is 689813.

It can be written as a sum of positive squares in 2 ways, for example, as 286225 + 32761 = 535^2 + 181^2 .

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

It is a congruent number.

It is an unprimeable number.

318986 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 470 + ... + 926.

2³¹⁸⁹⁸⁶ is an apocalyptic number.

318986 is a deficient number, since it is larger than the sum of its proper divisors (161914).

318986 is a wasteful number, since it uses less digits than its factorization.

318986 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 808.

The product of its digits is 10368, while the sum is 35.

The square root of 318986 is about 564.7884559727. The cubic root of 318986 is about 68.3267149383.

The spelling of 318986 in words is "three hundred eighteen thousand, nine hundred eighty-six".