718444818 has 48 divisors (see below), whose sum is σ = 1915857216. Its totient is φ = 189479520.

The previous prime is 718444789. The next prime is 718444823. The reversal of 718444818 is 818444817.

It is a happy number.

It is a super-2 number, since 2×718444818² = 1032325913022106248, which contains 22 as substring.

It is a Curzon number.

It is an unprimeable number.

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, 217668 + ... + 220943.

It is an arithmetic number, because the mean of its divisors is an integer number (39913692).

Almost surely, 2^718444818 is an apocalyptic number.

718444818 is a gapful number since it is divisible by the number (78) formed by its first and last digit.

718444818 is an abundant number, since it is smaller than the sum of its proper divisors (1197412398).

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

718444818 is a wasteful number, since it uses less digits than its factorization.

718444818 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 438639 (or 438636 counting only the distinct ones).

The product of its digits is 229376, while the sum is 45.

The square root of 718444818 is about 26803.8209589603. The cubic root of 718444818 is about 895.6351693173.

Subtracting 718444818 from its reverse (818444817), we obtain a palindrome (99999999).

The spelling of 718444818 in words is "seven hundred eighteen million, four hundred forty-four thousand, eight hundred eighteen".