318986138 has 8 divisors (see below), whose sum is σ = 494978580. Its totient is φ = 153993280.

The previous prime is 318986119. The next prime is 318986177. The reversal of 318986138 is 831689813.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 313892089 + 5094049 = 17717^2 + 2257^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 318986092 and 318986101.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2749823 + ... + 2749938.

Almost surely, 2^318986138 is an apocalyptic number.

318986138 is a deficient number, since it is larger than the sum of its proper divisors (175992442).

318986138 is a wasteful number, since it uses less digits than its factorization.

318986138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5499792.

The product of its digits is 248832, while the sum is 47.

The square root of 318986138 is about 17860.1830337766. The cubic root of 318986138 is about 683.2672479154.

The spelling of 318986138 in words is "three hundred eighteen million, nine hundred eighty-six thousand, one hundred thirty-eight".