81348044 has 12 divisors (see below), whose sum is σ = 149851800. Its totient is φ = 38533248.

The previous prime is 81348041. The next prime is 81348049. The reversal of 81348044 is 44084318.

It is a self number, because there is not a number n which added to its sum of digits gives 81348044.

It is not an unprimeable number, because it can be changed into a prime (81348041) 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 3 ways as a sum of consecutive naturals, for example, 535109 + ... + 535260.

It is an arithmetic number, because the mean of its divisors is an integer number (12487650).

Almost surely, 2^81348044 is an apocalyptic number.

It is an amenable number.

81348044 is a deficient number, since it is larger than the sum of its proper divisors (68503756).

81348044 is a wasteful number, since it uses less digits than its factorization.

81348044 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1070392 (or 1070390 counting only the distinct ones).

The product of its (nonzero) digits is 12288, while the sum is 32.

The square root of 81348044 is about 9019.3150515990. The cubic root of 81348044 is about 433.2936970979.

The spelling of 81348044 in words is "eighty-one million, three hundred forty-eight thousand, forty-four".