82220866 has 96 divisors (see below), whose sum is σ = 168652800. Its totient is φ = 29315520.

The previous prime is 82220851. The next prime is 82220893. The reversal of 82220866 is 66802228.

It is a congruent number.

It is an unprimeable number.

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 47 ways as a sum of consecutive naturals, for example, 1393545 + ... + 1393603.

It is an arithmetic number, because the mean of its divisors is an integer number (1756800).

Almost surely, 2^82220866 is an apocalyptic number.

82220866 is an abundant number, since it is smaller than the sum of its proper divisors (86431934).

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

82220866 is a wasteful number, since it uses less digits than its factorization.

82220866 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 144 (or 131 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 34.

The square root of 82220866 is about 9067.5722219346. The cubic root of 82220866 is about 434.8378591558.

The spelling of 82220866 in words is "eighty-two million, two hundred twenty thousand, eight hundred sixty-six".