684533868 has 48 divisors (see below), whose sum is σ = 1656014976. Its totient is φ = 219917440.

The previous prime is 684533833. The next prime is 684533869. The reversal of 684533868 is 868335486.

It is a self number, because there is not a number n which added to its sum of digits gives 684533868.

It is not an unprimeable number, because it can be changed into a prime (684533869) 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 15 ways as a sum of consecutive naturals, for example, 32455 + ... + 49217.

It is an arithmetic number, because the mean of its divisors is an integer number (34500312).

Almost surely, 2^684533868 is an apocalyptic number.

It is an amenable number.

684533868 is an abundant number, since it is smaller than the sum of its proper divisors (971481108).

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

684533868 is a wasteful number, since it uses less digits than its factorization.

684533868 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16894 (or 16892 counting only the distinct ones).

The product of its digits is 3317760, while the sum is 51.

The square root of 684533868 is about 26163.5981470439. The cubic root of 684533868 is about 881.3159838728.

The spelling of 684533868 in words is "six hundred eighty-four million, five hundred thirty-three thousand, eight hundred sixty-eight".