816986874 has 32 divisors (see below), whose sum is σ = 1805091840. Its totient is φ = 244436400.

The previous prime is 816986861. The next prime is 816986881. The reversal of 816986874 is 478689618.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 73132 + ... + 83559.

It is an arithmetic number, because the mean of its divisors is an integer number (56409120).

Almost surely, 2^816986874 is an apocalyptic number.

816986874 is an abundant number, since it is smaller than the sum of its proper divisors (988104966).

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

816986874 is a wasteful number, since it uses less digits than its factorization.

816986874 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 156786.

The product of its digits is 4644864, while the sum is 57.

The square root of 816986874 is about 28582.9822446854. The cubic root of 816986874 is about 934.8423095710.

The spelling of 816986874 in words is "eight hundred sixteen million, nine hundred eighty-six thousand, eight hundred seventy-four".