684000008 has 8 divisors (see below), whose sum is σ = 1282500030. Its totient is φ = 342000000.

The previous prime is 683999983. The next prime is 684000043. The reversal of 684000008 is 800000486.

It can be written as a sum of positive squares in only one way, i.e., 606242884 + 77757124 = 24622^2 + 8818^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42749993 + ... + 42750008.

Almost surely, 2^684000008 is an apocalyptic number.

It is an amenable number.

684000008 is a deficient number, since it is larger than the sum of its proper divisors (598500022).

684000008 is a wasteful number, since it uses less digits than its factorization.

684000008 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85500007 (or 85500003 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 26.

The square root of 684000008 is about 26153.3938141879. The cubic root of 684000008 is about 881.0868149261.

The spelling of 684000008 in words is "six hundred eighty-four million, eight", and thus it is an aban number.