71985912 has 32 divisors (see below), whose sum is σ = 180908880. Its totient is φ = 23869440.

The previous prime is 71985911. The next prime is 71985971. The reversal of 71985912 is 21958917.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71985911) by changing a digit.

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 in 7 ways as a sum of consecutive naturals, for example, 3139 + ... + 12402.

Almost surely, 2^71985912 is an apocalyptic number.

It is an amenable number.

71985912 is an abundant number, since it is smaller than the sum of its proper divisors (108922968).

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

71985912 is a wasteful number, since it uses less digits than its factorization.

71985912 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15743 (or 15739 counting only the distinct ones).

The product of its digits is 45360, while the sum is 42.

The square root of 71985912 is about 8484.4511902656. The cubic root of 71985912 is about 415.9896293026.

The spelling of 71985912 in words is "seventy-one million, nine hundred eighty-five thousand, nine hundred twelve".