684196884 has 144 divisors (see below), whose sum is σ = 2058376320. Its totient is φ = 187488000.

The previous prime is 684196883. The next prime is 684196921. The reversal of 684196884 is 488691486.

It is a self number, because there is not a number n which added to its sum of digits gives 684196884.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (684196883) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1834122 + ... + 1834494.

It is an arithmetic number, because the mean of its divisors is an integer number (14294280).

Almost surely, 2^684196884 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 684196884, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1029188160).

684196884 is an abundant number, since it is smaller than the sum of its proper divisors (1374179436).

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

684196884 is a wasteful number, since it uses less digits than its factorization.

684196884 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 670 (or 665 counting only the distinct ones).

The product of its digits is 2654208, while the sum is 54.

The square root of 684196884 is about 26157.1574143675. The cubic root of 684196884 is about 881.1713413420.

The spelling of 684196884 in words is "six hundred eighty-four million, one hundred ninety-six thousand, eight hundred eighty-four".