81058944 has 96 divisors (see below), whose sum is σ = 223881840. Its totient is φ = 25984000.

The previous prime is 81058931. The next prime is 81058951. The reversal of 81058944 is 44985018.

It is a tau number, because it is divible by the number of its divisors (96).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 322819 + ... + 323069.

Almost surely, 2^81058944 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 81058944, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (111940920).

81058944 is an abundant number, since it is smaller than the sum of its proper divisors (142822896).

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

81058944 is a wasteful number, since it uses less digits than its factorization.

81058944 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 326 (or 285 counting only the distinct ones).

The product of its (nonzero) digits is 46080, while the sum is 39.

The square root of 81058944 is about 9003.2740711366. The cubic root of 81058944 is about 432.7797986797.

The spelling of 81058944 in words is "eighty-one million, fifty-eight thousand, nine hundred forty-four".