7318818 has 24 divisors (see below), whose sum is σ = 17077788. Its totient is φ = 2251872.

The previous prime is 7318813. The next prime is 7318849. The reversal of 7318818 is 8188137.

It can be written as a sum of positive squares in 2 ways, for example, as 7144929 + 173889 = 2673^2 + 417^2 .

It is not an unprimeable number, because it can be changed into a prime (7318813) 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 11 ways as a sum of consecutive naturals, for example, 15405 + ... + 15872.

Almost surely, 2^7318818 is an apocalyptic number.

7318818 is a gapful number since it is divisible by the number (78) formed by its first and last digit.

7318818 is an abundant number, since it is smaller than the sum of its proper divisors (9758970).

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

7318818 is a wasteful number, since it uses less digits than its factorization.

7318818 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31298 (or 31295 counting only the distinct ones).

The product of its digits is 10752, while the sum is 36.

The square root of 7318818 is about 2705.3314029893. The cubic root of 7318818 is about 194.1542861646.

The spelling of 7318818 in words is "seven million, three hundred eighteen thousand, eight hundred eighteen".