71984312 has 32 divisors (see below), whose sum is σ = 142549200. Its totient is φ = 33984000.

The previous prime is 71984303. The next prime is 71984329. The reversal of 71984312 is 21348917.

It is a super-2 number, since 2×71984312² = 10363482348226688, which contains 22 as substring.

It is a congruent number.

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 7 ways as a sum of consecutive naturals, for example, 60362 + ... + 61542.

Almost surely, 2^71984312 is an apocalyptic number.

It is an amenable number.

71984312 is a deficient number, since it is larger than the sum of its proper divisors (70564888).

71984312 is a wasteful number, since it uses less digits than its factorization.

71984312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1607 (or 1603 counting only the distinct ones).

The product of its digits is 12096, while the sum is 35.

The square root of 71984312 is about 8484.3568996124. The cubic root of 71984312 is about 415.9865472721.

The spelling of 71984312 in words is "seventy-one million, nine hundred eighty-four thousand, three hundred twelve".