71239868 has 12 divisors (see below), whose sum is σ = 142479792. Its totient is φ = 30531360.

The previous prime is 71239867. The next prime is 71239871. The reversal of 71239868 is 86893217.

71239868 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71239867) 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 3 ways as a sum of consecutive naturals, for example, 1272113 + ... + 1272168.

It is an arithmetic number, because the mean of its divisors is an integer number (11873316).

Almost surely, 2^71239868 is an apocalyptic number.

It is an amenable number.

71239868 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

71239868 is a wasteful number, since it uses less digits than its factorization.

71239868 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2544292 (or 2544290 counting only the distinct ones).

The product of its digits is 145152, while the sum is 44.

The square root of 71239868 is about 8440.3713188461. The cubic root of 71239868 is about 414.5475651900.

The spelling of 71239868 in words is "seventy-one million, two hundred thirty-nine thousand, eight hundred sixty-eight".