81884722 has 8 divisors (see below), whose sum is σ = 122976000. Its totient is φ = 40892724.

The previous prime is 81884711. The next prime is 81884723. The reversal of 81884722 is 22748818.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (81884723) 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, 22722 + ... + 26077.

It is an arithmetic number, because the mean of its divisors is an integer number (15372000).

Almost surely, 2^81884722 is an apocalyptic number.

81884722 is a deficient number, since it is larger than the sum of its proper divisors (41091278).

81884722 is a wasteful number, since it uses less digits than its factorization.

81884722 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49640.

The product of its digits is 57344, while the sum is 40.

The square root of 81884722 is about 9049.0177367491. The cubic root of 81884722 is about 434.2444664587.

The spelling of 81884722 in words is "eighty-one million, eight hundred eighty-four thousand, seven hundred twenty-two".