82187812 has 12 divisors (see below), whose sum is σ = 164375680. Its totient is φ = 35223336.

The previous prime is 82187803. The next prime is 82187837. The reversal of 82187812 is 21878128.

82187812 is an admirable number.

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 3 ways as a sum of consecutive naturals, for example, 1467612 + ... + 1467667.

Almost surely, 2^82187812 is an apocalyptic number.

It is an amenable number.

82187812 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

82187812 is a wasteful number, since it uses less digits than its factorization.

82187812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2935290 (or 2935288 counting only the distinct ones).

The product of its digits is 14336, while the sum is 37.

The square root of 82187812 is about 9065.7493898740. The cubic root of 82187812 is about 434.7795809360.

The spelling of 82187812 in words is "eighty-two million, one hundred eighty-seven thousand, eight hundred twelve".