816788 has 24 divisors (see below), whose sum is σ = 1688064. Its totient is φ = 338400.

The previous prime is 816779. The next prime is 816811. The reversal of 816788 is 887618.

816788 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

816788 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 398 + ... + 1338.

It is an arithmetic number, because the mean of its divisors is an integer number (70336).

2⁸¹⁶⁷⁸⁸ 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 816788, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (844032).

816788 is an abundant number, since it is smaller than the sum of its proper divisors (871276).

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

816788 is a wasteful number, since it uses less digits than its factorization.

816788 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 983 (or 981 counting only the distinct ones).

The product of its digits is 21504, while the sum is 38.

The square root of 816788 is about 903.7632433331. The cubic root of 816788 is about 93.4766449145.

The spelling of 816788 in words is "eight hundred sixteen thousand, seven hundred eighty-eight".