84391836 has 12 divisors (see below), whose sum is σ = 196914312. Its totient is φ = 28130608.

The previous prime is 84391799. The next prime is 84391883. The reversal of 84391836 is 63819348.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3516315 + ... + 3516338.

It is an arithmetic number, because the mean of its divisors is an integer number (16409526).

Almost surely, 2^84391836 is an apocalyptic number.

It is an amenable number.

84391836 is an abundant number, since it is smaller than the sum of its proper divisors (112522476).

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

84391836 is a wasteful number, since it uses less digits than its factorization.

84391836 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7032660 (or 7032658 counting only the distinct ones).

The product of its digits is 124416, while the sum is 42.

The square root of 84391836 is about 9186.5029254880. The cubic root of 84391836 is about 438.6318313919.

The spelling of 84391836 in words is "eighty-four million, three hundred ninety-one thousand, eight hundred thirty-six".