81984044 has 18 divisors (see below), whose sum is σ = 148596084. Its totient is φ = 39576880.

The previous prime is 81984017. The next prime is 81984059. The reversal of 81984044 is 44048918.

It is a junction number, because it is equal to n+sod(n) for n = 81983989 and 81984007.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 8822 + ... + 15549.

It is an arithmetic number, because the mean of its divisors is an integer number (8255338).

Almost surely, 2^81984044 is an apocalyptic number.

It is an amenable number.

81984044 is a deficient number, since it is larger than the sum of its proper divisors (66612040).

81984044 is a wasteful number, since it uses less digits than its factorization.

81984044 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24433 (or 24402 counting only the distinct ones).

The product of its (nonzero) digits is 36864, while the sum is 38.

The square root of 81984044 is about 9054.5040725597. The cubic root of 81984044 is about 434.4199676649.

The spelling of 81984044 in words is "eighty-one million, nine hundred eighty-four thousand, forty-four".