71287872 has 28 divisors (see below), whose sum is σ = 188616336. Its totient is φ = 23762560.

The previous prime is 71287847. The next prime is 71287903. The reversal of 71287872 is 27878217.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 185454 + ... + 185837.

Almost surely, 2^71287872 is an apocalyptic number.

It is an amenable number.

71287872 is an abundant number, since it is smaller than the sum of its proper divisors (117328464).

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

71287872 is a wasteful number, since it uses less digits than its factorization.

71287872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 371306 (or 371296 counting only the distinct ones).

The product of its digits is 87808, while the sum is 42.

The square root of 71287872 is about 8443.2145537112. The cubic root of 71287872 is about 414.6406566652.

The spelling of 71287872 in words is "seventy-one million, two hundred eighty-seven thousand, eight hundred seventy-two".