318411918 has 128 divisors (see below), whose sum is σ = 824256000. Its totient is φ = 90097920.

The previous prime is 318411917. The next prime is 318411953. The reversal of 318411918 is 819114813.

It is a super-2 number, since 2×318411918² = 202772299048877448, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (318411913) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1004296 + ... + 1004612.

It is an arithmetic number, because the mean of its divisors is an integer number (6439500).

Almost surely, 2^318411918 is an apocalyptic number.

318411918 is a gapful number since it is divisible by the number (38) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 318411918, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (412128000).

318411918 is an abundant number, since it is smaller than the sum of its proper divisors (505844082).

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

318411918 is a wasteful number, since it uses less digits than its factorization.

318411918 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 447 (or 441 counting only the distinct ones).

The product of its digits is 6912, while the sum is 36.

The square root of 318411918 is about 17844.1003695899. The cubic root of 318411918 is about 682.8570092102.

The spelling of 318411918 in words is "three hundred eighteen million, four hundred eleven thousand, nine hundred eighteen".