816878674 has 8 divisors (see below), whose sum is σ = 1258434828. Its totient is φ = 397400400.

The previous prime is 816878639. The next prime is 816878731. The reversal of 816878674 is 476878618.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 792028449 + 24850225 = 28143^2 + 4985^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5519377 + ... + 5519524.

Almost surely, 2^816878674 is an apocalyptic number.

816878674 is a deficient number, since it is larger than the sum of its proper divisors (441556154).

816878674 is a wasteful number, since it uses less digits than its factorization.

816878674 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11038940.

The product of its digits is 3612672, while the sum is 55.

The square root of 816878674 is about 28581.0894473951. The cubic root of 816878674 is about 934.8010382414.

The spelling of 816878674 in words is "eight hundred sixteen million, eight hundred seventy-eight thousand, six hundred seventy-four".