318857994 has 72 divisors (see below), whose sum is σ = 865502820. Its totient is φ = 84091392.

The previous prime is 318857977. The next prime is 318857999. The reversal of 318857994 is 499758813.

It can be written as a sum of positive squares in 2 ways, for example, as 316377369 + 2480625 = 17787^2 + 1575^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 318857994.

It is not an unprimeable number, because it can be changed into a prime (318857999) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 2439 + ... + 25370.

Almost surely, 2^318857994 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 318857994, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (432751410).

318857994 is an abundant number, since it is smaller than the sum of its proper divisors (546644826).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

318857994 is a wasteful number, since it uses less digits than its factorization.

318857994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27844 (or 27834 counting only the distinct ones).

The product of its digits is 2177280, while the sum is 54.

The square root of 318857994 is about 17856.5952521750. The cubic root of 318857994 is about 683.1757409867.

The spelling of 318857994 in words is "three hundred eighteen million, eight hundred fifty-seven thousand, nine hundred ninety-four".