684091392 has 192 divisors, whose sum is σ = 1962455040. Its totient is φ = 211402752.

The previous prime is 684091381. The next prime is 684091403. The reversal of 684091392 is 293190486.

It is an interprime number because it is at equal distance from previous prime (684091381) and next prime (684091403).

It is a tau number, because it is divible by the number of its divisors (192).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6641613 + ... + 6641715.

It is an arithmetic number, because the mean of its divisors is an integer number (10221120).

Almost surely, 2^684091392 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 684091392, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (981227520).

684091392 is an abundant number, since it is smaller than the sum of its proper divisors (1278363648).

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

684091392 is a wasteful number, since it uses less digits than its factorization.

684091392 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 198 (or 178 counting only the distinct ones).

The product of its (nonzero) digits is 93312, while the sum is 42.

The square root of 684091392 is about 26155.1408331135. The cubic root of 684091392 is about 881.1260515981.

The spelling of 684091392 in words is "six hundred eighty-four million, ninety-one thousand, three hundred ninety-two".