84681636 has 24 divisors (see below), whose sum is σ = 212790144. Its totient is φ = 26055840.

The previous prime is 84681589. The next prime is 84681671. The reversal of 84681636 is 63618648.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 271260 + ... + 271571.

It is an arithmetic number, because the mean of its divisors is an integer number (8866256).

Almost surely, 2^84681636 is an apocalyptic number.

It is an amenable number.

84681636 is an abundant number, since it is smaller than the sum of its proper divisors (128108508).

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

84681636 is a wasteful number, since it uses less digits than its factorization.

84681636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 542851 (or 542849 counting only the distinct ones).

The product of its digits is 165888, while the sum is 42.

The square root of 84681636 is about 9202.2625478738. The cubic root of 84681636 is about 439.1333422947.

The spelling of 84681636 in words is "eighty-four million, six hundred eighty-one thousand, six hundred thirty-six".