71871868 has 6 divisors (see below), whose sum is σ = 125775776. Its totient is φ = 35935932.

The previous prime is 71871829. The next prime is 71871881. The reversal of 71871868 is 86817817.

It is a congruent 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 as a sum of consecutive naturals, namely, 8983980 + ... + 8983987.

Almost surely, 2^71871868 is an apocalyptic number.

It is an amenable number.

71871868 is a deficient number, since it is larger than the sum of its proper divisors (53903908).

71871868 is a wasteful number, since it uses less digits than its factorization.

71871868 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17967971 (or 17967969 counting only the distinct ones).

The product of its digits is 150528, while the sum is 46.

The square root of 71871868 is about 8477.7277616116. The cubic root of 71871868 is about 415.7698353875.

The spelling of 71871868 in words is "seventy-one million, eight hundred seventy-one thousand, eight hundred sixty-eight".