684326818 has 16 divisors (see below), whose sum is σ = 1201745664. Its totient is φ = 286129440.

The previous prime is 684326807. The next prime is 684326821. The reversal of 684326818 is 818623486.

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 7 ways as a sum of consecutive naturals, for example, 595530 + ... + 596677.

It is an arithmetic number, because the mean of its divisors is an integer number (75109104).

Almost surely, 2^684326818 is an apocalyptic number.

684326818 is a deficient number, since it is larger than the sum of its proper divisors (517418846).

684326818 is a wasteful number, since it uses less digits than its factorization.

684326818 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1192257.

The product of its digits is 442368, while the sum is 46.

The square root of 684326818 is about 26159.6410143564. The cubic root of 684326818 is about 881.2271181088.

The spelling of 684326818 in words is "six hundred eighty-four million, three hundred twenty-six thousand, eight hundred eighteen".