82639886 has 16 divisors (see below), whose sum is σ = 141879264. Its totient is φ = 35364384.

The previous prime is 82639867. The next prime is 82639891. The reversal of 82639886 is 68893628.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6236 + ... + 14288.

It is an arithmetic number, because the mean of its divisors is an integer number (8867454).

Almost surely, 2^82639886 is an apocalyptic number.

82639886 is a deficient number, since it is larger than the sum of its proper divisors (59239378).

82639886 is a wasteful number, since it uses less digits than its factorization.

82639886 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8795.

The product of its digits is 995328, while the sum is 50.

The square root of 82639886 is about 9090.6482717131. The cubic root of 82639886 is about 435.5752920343.

The spelling of 82639886 in words is "eighty-two million, six hundred thirty-nine thousand, eight hundred eighty-six".