865668888 has 96 divisors (see below), whose sum is σ = 2734212000. Its totient is φ = 247326912.

The previous prime is 865668851. The next prime is 865668901. The reversal of 865668888 is 888866568.

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

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, 7170 + ... + 42222.

It is an arithmetic number, because the mean of its divisors is an integer number (28481375).

Almost surely, 2^865668888 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 865668888, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1367106000).

865668888 is an abundant number, since it is smaller than the sum of its proper divisors (1868543112).

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

865668888 is a wasteful number, since it uses less digits than its factorization.

865668888 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35086 (or 35065 counting only the distinct ones).

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

The square root of 865668888 is about 29422.2515793744. The cubic root of 865668888 is about 953.0534762461.

The spelling of 865668888 in words is "eight hundred sixty-five million, six hundred sixty-eight thousand, eight hundred eighty-eight".