71982028 has 12 divisors (see below), whose sum is σ = 126520240. Its totient is φ = 35833392.

The previous prime is 71982023. The next prime is 71982047. The reversal of 71982028 is 82028917.

It is not an unprimeable number, because it can be changed into a prime (71982023) 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 3 ways as a sum of consecutive naturals, for example, 38376 + ... + 40207.

Almost surely, 2^71982028 is an apocalyptic number.

It is an amenable number.

71982028 is a deficient number, since it is larger than the sum of its proper divisors (54538212).

71982028 is a wasteful number, since it uses less digits than its factorization.

71982028 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78816 (or 78814 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 37.

The square root of 71982028 is about 8484.2222978892. Note that the first 4 decimals coincide. The cubic root of 71982028 is about 415.9821475943.

The spelling of 71982028 in words is "seventy-one million, nine hundred eighty-two thousand, twenty-eight".