82081860 has 72 divisors (see below), whose sum is σ = 267361920. Its totient is φ = 18760896.

The previous prime is 82081859. The next prime is 82081891. The reversal of 82081860 is 6818028.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 11020 + ... + 16899.

It is an arithmetic number, because the mean of its divisors is an integer number (3713360).

Almost surely, 2^82081860 is an apocalyptic number.

It is an amenable number.

82081860 is an abundant number, since it is smaller than the sum of its proper divisors (185280060).

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

82081860 is a wasteful number, since it uses less digits than its factorization.

82081860 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27945 (or 27936 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 33.

The square root of 82081860 is about 9059.9039730010. The cubic root of 82081860 is about 434.5926692988.

Adding to 82081860 its reverse (6818028), we get a palindrome (88899888).

The spelling of 82081860 in words is "eighty-two million, eighty-one thousand, eight hundred sixty".