82185580 has 12 divisors (see below), whose sum is σ = 172589760. Its totient is φ = 32874224.

The previous prime is 82185559. The next prime is 82185589. The reversal of 82185580 is 8558128.

It is not an unprimeable number, because it can be changed into a prime (82185589) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 2054620 + ... + 2054659.

It is an arithmetic number, because the mean of its divisors is an integer number (14382480).

Almost surely, 2^82185580 is an apocalyptic number.

It is an amenable number.

82185580 is an abundant number, since it is smaller than the sum of its proper divisors (90404180).

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

82185580 is a wasteful number, since it uses less digits than its factorization.

82185580 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4109288 (or 4109286 counting only the distinct ones).

The product of its (nonzero) digits is 25600, while the sum is 37.

The square root of 82185580 is about 9065.6262883488. The cubic root of 82185580 is about 434.7756450856.

The spelling of 82185580 in words is "eighty-two million, one hundred eighty-five thousand, five hundred eighty".