816788868 has 96 divisors (see below), whose sum is σ = 2380750848. Its totient is φ = 212544000.

The previous prime is 816788849. The next prime is 816788909. The reversal of 816788868 is 868887618.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 35043 + ... + 53493.

It is an arithmetic number, because the mean of its divisors is an integer number (24799488).

Almost surely, 2^816788868 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 816788868, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1190375424).

816788868 is an abundant number, since it is smaller than the sum of its proper divisors (1563961980).

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

816788868 is a wasteful number, since it uses less digits than its factorization.

816788868 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18513 (or 18511 counting only the distinct ones).

The product of its digits is 8257536, while the sum is 60.

The square root of 816788868 is about 28579.5183304408. The cubic root of 816788868 is about 934.7667802700.

The spelling of 816788868 in words is "eight hundred sixteen million, seven hundred eighty-eight thousand, eight hundred sixty-eight".