81882234 has 144 divisors (see below), whose sum is σ = 225358848. Its totient is φ = 21337344.

The previous prime is 81882223. The next prime is 81882247. The reversal of 81882234 is 43228818.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 644679 + ... + 644805.

It is an arithmetic number, because the mean of its divisors is an integer number (1564992).

Almost surely, 2^81882234 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 81882234, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (112679424).

81882234 is an abundant number, since it is smaller than the sum of its proper divisors (143476614).

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

81882234 is a wasteful number, since it uses less digits than its factorization.

81882234 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 209 (or 199 counting only the distinct ones).

The product of its digits is 24576, while the sum is 36.

The square root of 81882234 is about 9048.8802622203. The cubic root of 81882234 is about 434.2400683603.

The spelling of 81882234 in words is "eighty-one million, eight hundred eighty-two thousand, two hundred thirty-four".