81350984 has 128 divisors (see below), whose sum is σ = 195955200. Its totient is φ = 31088640.

The previous prime is 81350959. The next prime is 81351007. The reversal of 81350984 is 48905318.

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 31 ways as a sum of consecutive naturals, for example, 914012 + ... + 914100.

It is an arithmetic number, because the mean of its divisors is an integer number (1530900).

Almost surely, 2^81350984 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 81350984, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (97977600).

81350984 is an abundant number, since it is smaller than the sum of its proper divisors (114604216).

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

81350984 is a wasteful number, since it uses less digits than its factorization.

81350984 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 183 (or 179 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 38.

The square root of 81350984 is about 9019.4780336780. The cubic root of 81350984 is about 433.2989169248.

The spelling of 81350984 in words is "eighty-one million, three hundred fifty thousand, nine hundred eighty-four".