81194344 has 64 divisors (see below), whose sum is σ = 192067200. Its totient is φ = 31257600.

The previous prime is 81194341. The next prime is 81194359. The reversal of 81194344 is 44349118.

It is not an unprimeable number, because it can be changed into a prime (81194341) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 54084 + ... + 55564.

It is an arithmetic number, because the mean of its divisors is an integer number (3001050).

Almost surely, 2^81194344 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 81194344, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (96033600).

81194344 is an abundant number, since it is smaller than the sum of its proper divisors (110872856).

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

81194344 is a wasteful number, since it uses less digits than its factorization.

81194344 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1594 (or 1590 counting only the distinct ones).

The product of its digits is 13824, while the sum is 34.

The square root of 81194344 is about 9010.7904203793. The cubic root of 81194344 is about 433.0206348939.

The spelling of 81194344 in words is "eighty-one million, one hundred ninety-four thousand, three hundred forty-four".