81484044 has 24 divisors (see below), whose sum is σ = 193248048. Its totient is φ = 26715840.

The previous prime is 81484037. The next prime is 81484057. The reversal of 81484044 is 44048418.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 81483996 and 81484014.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 54927 + ... + 56390.

It is an arithmetic number, because the mean of its divisors is an integer number (8052002).

Almost surely, 2^81484044 is an apocalyptic number.

It is an amenable number.

81484044 is an abundant number, since it is smaller than the sum of its proper divisors (111764004).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

81484044 is a wasteful number, since it uses less digits than its factorization.

81484044 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 111385 (or 111383 counting only the distinct ones).

The product of its (nonzero) digits is 16384, while the sum is 33.

The square root of 81484044 is about 9026.8512782697. The cubic root of 81484044 is about 433.5350269493.

The spelling of 81484044 in words is "eighty-one million, four hundred eighty-four thousand, forty-four".