84145686 has 16 divisors (see below), whose sum is σ = 168998400. Its totient is φ = 27930728.

The previous prime is 84145639. The next prime is 84145693. The reversal of 84145686 is 68654148.

It is a Curzon number.

It is a congruent number.

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, 27906 + ... + 30773.

It is an arithmetic number, because the mean of its divisors is an integer number (10562400).

Almost surely, 2^84145686 is an apocalyptic number.

84145686 is an abundant number, since it is smaller than the sum of its proper divisors (84852714).

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

84145686 is a wasteful number, since it uses less digits than its factorization.

84145686 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58923.

The product of its digits is 184320, while the sum is 42.

The square root of 84145686 is about 9173.0957696952. The cubic root of 84145686 is about 438.2049561001.

The spelling of 84145686 in words is "eighty-four million, one hundred forty-five thousand, six hundred eighty-six".