81794444 has 12 divisors (see below), whose sum is σ = 144102000. Its totient is φ = 40622448.

The previous prime is 81794441. The next prime is 81794459. The reversal of 81794444 is 44449718.

It is a hoax number, since the sum of its digits (41) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (81794441) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 68024 + ... + 69215.

It is an arithmetic number, because the mean of its divisors is an integer number (12008500).

Almost surely, 2^81794444 is an apocalyptic number.

It is an amenable number.

81794444 is a deficient number, since it is larger than the sum of its proper divisors (62307556).

81794444 is a wasteful number, since it uses less digits than its factorization.

81794444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 137392 (or 137390 counting only the distinct ones).

The product of its digits is 129024, while the sum is 41.

The square root of 81794444 is about 9044.0280848746. The cubic root of 81794444 is about 434.0848227676.

The spelling of 81794444 in words is "eighty-one million, seven hundred ninety-four thousand, four hundred forty-four".