81752044 has 48 divisors (see below), whose sum is σ = 163699200. Its totient is φ = 35380800.

The previous prime is 81752039. The next prime is 81752057. The reversal of 81752044 is 44025718.

It is a junction number, because it is equal to n+sod(n) for n = 81751997 and 81752015.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 100399 + ... + 101209.

It is an arithmetic number, because the mean of its divisors is an integer number (3410400).

Almost surely, 2^81752044 is an apocalyptic number.

It is an amenable number.

81752044 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

81752044 is a wasteful number, since it uses less digits than its factorization.

81752044 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 934 (or 932 counting only the distinct ones).

The product of its (nonzero) digits is 8960, while the sum is 31.

The square root of 81752044 is about 9041.6836927643. The cubic root of 81752044 is about 434.0098039083.

The spelling of 81752044 in words is "eighty-one million, seven hundred fifty-two thousand, forty-four".