684109296 has 90 divisors (see below), whose sum is σ = 2073231888. Its totient is φ = 210487680.

The previous prime is 684109289. The next prime is 684109301. The reversal of 684109296 is 692901486.

It is a happy number.

684109296 is a `hidden beast` number, since 68 + 410 + 92 + 96 = 666.

684109296 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 10281 + ... + 38391.

Almost surely, 2^684109296 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 684109296, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1036615944).

684109296 is an abundant number, since it is smaller than the sum of its proper divisors (1389122592).

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

684109296 is a wasteful number, since it uses less digits than its factorization.

684109296 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28151 (or 28129 counting only the distinct ones).

The product of its (nonzero) digits is 186624, while the sum is 45.

The square root of 684109296 is about 26155.4830962840. The cubic root of 684109296 is about 881.1337384576.

The spelling of 684109296 in words is "six hundred eighty-four million, one hundred nine thousand, two hundred ninety-six".