71865836 has 12 divisors (see below), whose sum is σ = 143731728. Its totient is φ = 30799632.

The previous prime is 71865713. The next prime is 71865841. The reversal of 71865836 is 63856817.

71865836 is an admirable number.

It is a hoax number, since the sum of its digits (44) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1283291 + ... + 1283346.

It is an arithmetic number, because the mean of its divisors is an integer number (11977644).

Almost surely, 2^71865836 is an apocalyptic number.

It is an amenable number.

71865836 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.

71865836 is a wasteful number, since it uses less digits than its factorization.

71865836 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2566648 (or 2566646 counting only the distinct ones).

The product of its digits is 241920, while the sum is 44.

The square root of 71865836 is about 8477.3719984439. The cubic root of 71865836 is about 415.7582036050.

The spelling of 71865836 in words is "seventy-one million, eight hundred sixty-five thousand, eight hundred thirty-six".