685368684 has 486 divisors, whose sum is σ = 2524927860. Its totient is φ = 155675520.

The previous prime is 685368683. The next prime is 685368731. The reversal of 685368684 is 486863586.

It is a self number, because there is not a number n which added to its sum of digits gives 685368684.

It is not an unprimeable number, because it can be changed into a prime (685368683) by changing a digit.

It is a polite number, since it can be written in 161 ways as a sum of consecutive naturals, for example, 36072027 + ... + 36072045.

Almost surely, 2^685368684 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 685368684, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1262463930).

685368684 is an abundant number, since it is smaller than the sum of its proper divisors (1839559176).

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

685368684 is a wasteful number, since it uses less digits than its factorization.

685368684 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91 (or 55 counting only the distinct ones).

The product of its digits is 6635520, while the sum is 54.

The square root of 685368684 is about 26179.5470549053. The cubic root of 685368684 is about 881.6741048436.

The spelling of 685368684 in words is "six hundred eighty-five million, three hundred sixty-eight thousand, six hundred eighty-four".