866868084 has 72 divisors (see below), whose sum is σ = 2362913280. Its totient is φ = 267062400.

The previous prime is 866868077. The next prime is 866868151. The reversal of 866868084 is 480868668.

It is a self number, because there is not a number n which added to its sum of digits gives 866868084.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 12589 + ... + 43499.

It is an arithmetic number, because the mean of its divisors is an integer number (32818240).

Almost surely, 2^866868084 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 866868084, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1181456640).

866868084 is an abundant number, since it is smaller than the sum of its proper divisors (1496045196).

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

866868084 is a wasteful number, since it uses less digits than its factorization.

866868084 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30981 (or 30976 counting only the distinct ones).

The product of its (nonzero) digits is 3538944, while the sum is 54.

The square root of 866868084 is about 29442.6235923363. The cubic root of 866868084 is about 953.4933559709.

The spelling of 866868084 in words is "eight hundred sixty-six million, eight hundred sixty-eight thousand, eighty-four".