805216788 has 60 divisors (see below), whose sum is σ = 2126779732. Its totient is φ = 265628160.

The previous prime is 805216739. The next prime is 805216801. The reversal of 805216788 is 887612508.

It can be written as a sum of positive squares in 2 ways, for example, as 245799684 + 559417104 = 15678^2 + 23652^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 18618 + ... + 44238.

Almost surely, 2^805216788 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 805216788, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1063389866).

805216788 is an abundant number, since it is smaller than the sum of its proper divisors (1321562944).

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

805216788 is a wasteful number, since it uses less digits than its factorization.

805216788 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25734 (or 25723 counting only the distinct ones).

The product of its (nonzero) digits is 215040, while the sum is 45.

The square root of 805216788 is about 28376.3420475579. The cubic root of 805216788 is about 930.3312451673.

The spelling of 805216788 in words is "eight hundred five million, two hundred sixteen thousand, seven hundred eighty-eight".