684808804 has 12 divisors (see below), whose sum is σ = 1199043328. Its totient is φ = 342225000.

The previous prime is 684808801. The next prime is 684808823. The reversal of 684808804 is 408808486.

It is a hoax number, since the sum of its digits (46) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (684808801) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 36072 + ... + 51679.

Almost surely, 2^684808804 is an apocalyptic number.

It is an amenable number.

684808804 is a deficient number, since it is larger than the sum of its proper divisors (514234524).

684808804 is a wasteful number, since it uses less digits than its factorization.

684808804 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89706 (or 89704 counting only the distinct ones).

The product of its (nonzero) digits is 393216, while the sum is 46.

The square root of 684808804 is about 26168.8517898665. The cubic root of 684808804 is about 881.4339585852.

It can be divided in two parts, 68480 and 8804, that added together give a square (77284 = 278²).

The spelling of 684808804 in words is "six hundred eighty-four million, eight hundred eight thousand, eight hundred four".