71983136 has 24 divisors (see below), whose sum is σ = 141910524. Its totient is φ = 35942400.

The previous prime is 71983129. The next prime is 71983139. The reversal of 71983136 is 63138917.

It can be written as a sum of positive squares in 2 ways, for example, as 43296400 + 28686736 = 6580^2 + 5356^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 71983136.

It is not an unprimeable number, because it can be changed into a prime (71983139) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 37496 + ... + 39368.

Almost surely, 2^71983136 is an apocalyptic number.

It is an amenable number.

71983136 is a deficient number, since it is larger than the sum of its proper divisors (69927388).

71983136 is a wasteful number, since it uses less digits than its factorization.

71983136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3084 (or 3076 counting only the distinct ones).

The product of its digits is 27216, while the sum is 38.

The square root of 71983136 is about 8484.2875953141. The cubic root of 71983136 is about 415.9842819505.

The spelling of 71983136 in words is "seventy-one million, nine hundred eighty-three thousand, one hundred thirty-six".