816764874 has 64 divisors (see below), whose sum is σ = 1777904640. Its totient is φ = 249500160.

The previous prime is 816764863. The next prime is 816764887. The reversal of 816764874 is 478467618.

It is a happy 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 31 ways as a sum of consecutive naturals, for example, 284454 + ... + 287310.

It is an arithmetic number, because the mean of its divisors is an integer number (27779760).

Almost surely, 2^816764874 is an apocalyptic number.

816764874 is an abundant number, since it is smaller than the sum of its proper divisors (961139766).

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

816764874 is a wasteful number, since it uses less digits than its factorization.

816764874 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2975.

The product of its digits is 1806336, while the sum is 51.

The square root of 816764874 is about 28579.0985512140. The cubic root of 816764874 is about 934.7576269402.

The spelling of 816764874 in words is "eight hundred sixteen million, seven hundred sixty-four thousand, eight hundred seventy-four".