81448708 has 24 divisors (see below), whose sum is σ = 159112800. Its totient is φ = 36160320.

The previous prime is 81448699. The next prime is 81448709. The reversal of 81448708 is 80784418.

It is not an unprimeable number, because it can be changed into a prime (81448709) 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 7 ways as a sum of consecutive naturals, for example, 19633 + ... + 23416.

It is an arithmetic number, because the mean of its divisors is an integer number (6629700).

Almost surely, 2^81448708 is an apocalyptic number.

It is an amenable number.

81448708 is a deficient number, since it is larger than the sum of its proper divisors (77664092).

81448708 is a wasteful number, since it uses less digits than its factorization.

81448708 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43107 (or 43105 counting only the distinct ones).

The product of its (nonzero) digits is 57344, while the sum is 40.

The square root of 81448708 is about 9024.8937943889. The cubic root of 81448708 is about 433.4723496122.

The spelling of 81448708 in words is "eighty-one million, four hundred forty-eight thousand, seven hundred eight".