318518816 has 144 divisors (see below), whose sum is σ = 811853280. Its totient is φ = 121605120.

The previous prime is 318518813. The next prime is 318518821. The reversal of 318518816 is 618815813.

It is a super-2 number, since 2×318518816² = 202908472292083712, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (318518813) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1017476 + ... + 1017788.

It is an arithmetic number, because the mean of its divisors is an integer number (5637870).

Almost surely, 2^318518816 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 318518816, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (405926640).

318518816 is an abundant number, since it is smaller than the sum of its proper divisors (493334464).

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

318518816 is a wasteful number, since it uses less digits than its factorization.

318518816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 407 (or 392 counting only the distinct ones).

The product of its digits is 46080, while the sum is 41.

The square root of 318518816 is about 17847.0954499605. The cubic root of 318518816 is about 682.9334174486.

The spelling of 318518816 in words is "three hundred eighteen million, five hundred eighteen thousand, eight hundred sixteen".