684465018 has 64 divisors (see below), whose sum is σ = 1465084800. Its totient is φ = 212808960.

The previous prime is 684465007. The next prime is 684465037. The reversal of 684465018 is 810564486.

684465018 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 625680 + ... + 626772.

It is an arithmetic number, because the mean of its divisors is an integer number (22891950).

Almost surely, 2^684465018 is an apocalyptic number.

684465018 is an abundant number, since it is smaller than the sum of its proper divisors (780619782).

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

684465018 is a wasteful number, since it uses less digits than its factorization.

684465018 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1247.

The product of its (nonzero) digits is 184320, while the sum is 42.

The square root of 684465018 is about 26162.2823545653. The cubic root of 684465018 is about 881.2864354736.

The spelling of 684465018 in words is "six hundred eighty-four million, four hundred sixty-five thousand, eighteen".