684163812 has 48 divisors (see below), whose sum is σ = 1613610432. Its totient is φ = 225607680.

The previous prime is 684163807. The next prime is 684163813. The reversal of 684163812 is 218361486.

It is not an unprimeable number, because it can be changed into a prime (684163813) 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, 502012 + ... + 503372.

It is an arithmetic number, because the mean of its divisors is an integer number (33616884).

Almost surely, 2^684163812 is an apocalyptic number.

It is an amenable number.

684163812 is an abundant number, since it is smaller than the sum of its proper divisors (929446620).

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

684163812 is a wasteful number, since it uses less digits than its factorization.

684163812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1788 (or 1786 counting only the distinct ones).

The product of its digits is 55296, while the sum is 39.

The square root of 684163812 is about 26156.5252279426. The cubic root of 684163812 is about 881.1571433975.

The spelling of 684163812 in words is "six hundred eighty-four million, one hundred sixty-three thousand, eight hundred twelve".