816712878 has 16 divisors (see below), whose sum is σ = 1729509840. Its totient is φ = 256223616.

The previous prime is 816712873. The next prime is 816712903. The reversal of 816712878 is 878217618.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (816712873) 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, 4003393 + ... + 4003596.

It is an arithmetic number, because the mean of its divisors is an integer number (108094365).

Almost surely, 2^816712878 is an apocalyptic number.

816712878 is an abundant number, since it is smaller than the sum of its proper divisors (912796962).

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

816712878 is a wasteful number, since it uses less digits than its factorization.

816712878 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8007011.

The product of its digits is 301056, while the sum is 48.

The square root of 816712878 is about 28578.1888509402. The cubic root of 816712878 is about 934.7377906770.

The spelling of 816712878 in words is "eight hundred sixteen million, seven hundred twelve thousand, eight hundred seventy-eight".