684696630 has 16 divisors (see below), whose sum is σ = 1643271984. Its totient is φ = 182585760.

The previous prime is 684696619. The next prime is 684696653. The reversal of 684696630 is 36696486.

684696630 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 684696630.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11411581 + ... + 11411640.

It is an arithmetic number, because the mean of its divisors is an integer number (102704499).

Almost surely, 2^684696630 is an apocalyptic number.

684696630 is an abundant number, since it is smaller than the sum of its proper divisors (958575354).

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

684696630 is a wasteful number, since it uses less digits than its factorization.

684696630 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22823231.

The product of its (nonzero) digits is 1119744, while the sum is 48.

The square root of 684696630 is about 26166.7084288414. The cubic root of 684696630 is about 881.3858286686.

The spelling of 684696630 in words is "six hundred eighty-four million, six hundred ninety-six thousand, six hundred thirty".