858868668 has 108 divisors (see below), whose sum is σ = 2635410960. Its totient is φ = 234710784.

The previous prime is 858868663. The next prime is 858868709. The reversal of 858868668 is 866868858.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (858868663) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 29988 + ... + 51156.

Almost surely, 2^858868668 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 858868668, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1317705480).

858868668 is an abundant number, since it is smaller than the sum of its proper divisors (1776542292).

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

858868668 is a wasteful number, since it uses less digits than its factorization.

858868668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21216 (or 21204 counting only the distinct ones).

The product of its digits is 35389440, while the sum is 63.

The square root of 858868668 is about 29306.4611988551. The cubic root of 858868668 is about 950.5513578745.

The spelling of 858868668 in words is "eight hundred fifty-eight million, eight hundred sixty-eight thousand, six hundred sixty-eight".