82139556 has 24 divisors (see below), whose sum is σ = 196840000. Its totient is φ = 26639712.

The previous prime is 82139537. The next prime is 82139567. The reversal of 82139556 is 65593128.

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 7 ways as a sum of consecutive naturals, for example, 92056 + ... + 92943.

Almost surely, 2^82139556 is an apocalyptic number.

It is an amenable number.

82139556 is an abundant number, since it is smaller than the sum of its proper divisors (114700444).

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

82139556 is a wasteful number, since it uses less digits than its factorization.

82139556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 185043 (or 185041 counting only the distinct ones).

The product of its digits is 64800, while the sum is 39.

The square root of 82139556 is about 9063.0875533672. The cubic root of 82139556 is about 434.6944716783.

The spelling of 82139556 in words is "eighty-two million, one hundred thirty-nine thousand, five hundred fifty-six".