71868872 has 16 divisors (see below), whose sum is σ = 135145500. Its totient is φ = 35830080.

The previous prime is 71868857. The next prime is 71868889. The reversal of 71868872 is 27886817.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 68128516 + 3740356 = 8254^2 + 1934^2 .

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, 10079 + ... + 15662.

Almost surely, 2^71868872 is an apocalyptic number.

It is an amenable number.

71868872 is a deficient number, since it is larger than the sum of its proper divisors (63276628).

71868872 is a wasteful number, since it uses less digits than its factorization.

71868872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26096 (or 26092 counting only the distinct ones).

The product of its digits is 301056, while the sum is 47.

The square root of 71868872 is about 8477.5510614800. The cubic root of 71868872 is about 415.7640581445.

The spelling of 71868872 in words is "seventy-one million, eight hundred sixty-eight thousand, eight hundred seventy-two".