816389268 has 24 divisors (see below), whose sum is σ = 1908833472. Its totient is φ = 271569024.

The previous prime is 816389267. The next prime is 816389279. The reversal of 816389268 is 862983618.

It is a self number, because there is not a number n which added to its sum of digits gives 816389268.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (816389261) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 64005 + ... + 75692.

It is an arithmetic number, because the mean of its divisors is an integer number (79534728).

Almost surely, 2^816389268 is an apocalyptic number.

It is an amenable number.

816389268 is an abundant number, since it is smaller than the sum of its proper divisors (1092444204).

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

816389268 is a wasteful number, since it uses less digits than its factorization.

816389268 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 140191 (or 140189 counting only the distinct ones).

The product of its digits is 995328, while the sum is 51.

The square root of 816389268 is about 28572.5264546207. The cubic root of 816389268 is about 934.6143158444.

The spelling of 816389268 in words is "eight hundred sixteen million, three hundred eighty-nine thousand, two hundred sixty-eight".