865020084 has 12 divisors (see below), whose sum is σ = 2018380224. Its totient is φ = 288340024.

The previous prime is 865020083. The next prime is 865020097. The reversal of 865020084 is 480020568.

865020084 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (865020083) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 36042492 + ... + 36042515.

It is an arithmetic number, because the mean of its divisors is an integer number (168198352).

Almost surely, 2^865020084 is an apocalyptic number.

It is an amenable number.

865020084 is an abundant number, since it is smaller than the sum of its proper divisors (1153360140).

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

865020084 is a wasteful number, since it uses less digits than its factorization.

865020084 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72085014 (or 72085012 counting only the distinct ones).

The product of its (nonzero) digits is 15360, while the sum is 33.

The square root of 865020084 is about 29411.2237759669. The cubic root of 865020084 is about 952.8153176537.

The spelling of 865020084 in words is "eight hundred sixty-five million, twenty thousand, eighty-four".