684119380 has 72 divisors (see below), whose sum is σ = 1680329448. Its totient is φ = 233275392.

The previous prime is 684119353. The next prime is 684119411. The reversal of 684119380 is 83911486.

It can be written as a sum of positive squares in 4 ways, for example, as 19820304 + 664299076 = 4452^2 + 25774^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 187332 + ... + 190948.

It is an arithmetic number, because the mean of its divisors is an integer number (23337909).

Almost surely, 2^684119380 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 684119380, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (840164724).

684119380 is an abundant number, since it is smaller than the sum of its proper divisors (996210068).

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

684119380 is a wasteful number, since it uses less digits than its factorization.

684119380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3833 (or 3824 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 40.

The square root of 684119380 is about 26155.6758658613. The cubic root of 684119380 is about 881.1380678384.

The spelling of 684119380 in words is "six hundred eighty-four million, one hundred nineteen thousand, three hundred eighty".