71984428 has 12 divisors (see below), whose sum is σ = 126087192. Its totient is φ = 35959520.

The previous prime is 71984413. The next prime is 71984431. The reversal of 71984428 is 82448917.

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, 2833 + ... + 12328.

It is an arithmetic number, because the mean of its divisors is an integer number (10507266).

Almost surely, 2^71984428 is an apocalyptic number.

It is an amenable number.

71984428 is a deficient number, since it is larger than the sum of its proper divisors (54102764).

71984428 is a wasteful number, since it uses less digits than its factorization.

71984428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16352 (or 16350 counting only the distinct ones).

The product of its digits is 129024, while the sum is 43.

The square root of 71984428 is about 8484.3637357200. The cubic root of 71984428 is about 415.9867707208.

The spelling of 71984428 in words is "seventy-one million, nine hundred eighty-four thousand, four hundred twenty-eight".