858885012 has 96 divisors (see below), whose sum is σ = 2282515200. Its totient is φ = 279216000.

The previous prime is 858884947. The next prime is 858885017. The reversal of 858885012 is 210588858.

858885012 is a `hidden beast` number, since 8 + 588 + 8 + 50 + 12 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (858885017) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 773914 + ... + 775022.

It is an arithmetic number, because the mean of its divisors is an integer number (23776200).

Almost surely, 2^858885012 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 858885012, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1141257600).

858885012 is an abundant number, since it is smaller than the sum of its proper divisors (1423630188).

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

858885012 is a wasteful number, since it uses less digits than its factorization.

858885012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1294 (or 1286 counting only the distinct ones).

The product of its (nonzero) digits is 204800, while the sum is 45.

The square root of 858885012 is about 29306.7400438875. The cubic root of 858885012 is about 950.5573874005.

The spelling of 858885012 in words is "eight hundred fifty-eight million, eight hundred eighty-five thousand, twelve".