71718918 has 16 divisors (see below), whose sum is σ = 143659056. Its totient is φ = 23869440.

The previous prime is 71718887. The next prime is 71718929. The reversal of 71718918 is 81981717.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 71718918.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4843 + ... + 12918.

It is an arithmetic number, because the mean of its divisors is an integer number (8978691).

Almost surely, 2^71718918 is an apocalyptic number.

71718918 is an abundant number, since it is smaller than the sum of its proper divisors (71940138).

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

71718918 is a wasteful number, since it uses less digits than its factorization.

71718918 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18439.

The product of its digits is 28224, while the sum is 42.

The square root of 71718918 is about 8468.7022618581. The cubic root of 71718918 is about 415.4746936703.

The spelling of 71718918 in words is "seventy-one million, seven hundred eighteen thousand, nine hundred eighteen".