82565886 has 32 divisors (see below), whose sum is σ = 178204320. Its totient is φ = 25352064.

The previous prime is 82565867. The next prime is 82565893. The reversal of 82565886 is 68856528.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 54556 + ... + 56048.

It is an arithmetic number, because the mean of its divisors is an integer number (5568885).

Almost surely, 2^82565886 is an apocalyptic number.

82565886 is an abundant number, since it is smaller than the sum of its proper divisors (95638434).

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

82565886 is a wasteful number, since it uses less digits than its factorization.

82565886 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2220.

The product of its digits is 921600, while the sum is 48.

The square root of 82565886 is about 9086.5772433849. The cubic root of 82565886 is about 435.4452410430.

The spelling of 82565886 in words is "eighty-two million, five hundred sixty-five thousand, eight hundred eighty-six".