684884872 has 16 divisors (see below), whose sum is σ = 1467610560. Its totient is φ = 293522064.

The previous prime is 684884857. The next prime is 684884927. The reversal of 684884872 is 278488486.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6114988 + ... + 6115099.

It is an arithmetic number, because the mean of its divisors is an integer number (91725660).

Almost surely, 2^684884872 is an apocalyptic number.

It is an amenable number.

684884872 is an abundant number, since it is smaller than the sum of its proper divisors (782725688).

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

684884872 is a wasteful number, since it uses less digits than its factorization.

684884872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12230100 (or 12230096 counting only the distinct ones).

The product of its digits is 5505024, while the sum is 55.

The square root of 684884872 is about 26170.3051567994. The cubic root of 684884872 is about 881.4665936972.

The spelling of 684884872 in words is "six hundred eighty-four million, eight hundred eighty-four thousand, eight hundred seventy-two".