199680684 has 72 divisors (see below), whose sum is σ = 549739008. Its totient is φ = 56236320.

The previous prime is 199680673. The next prime is 199680707. The reversal of 199680684 is 486086991.

It is a happy number.

It is a Smith number, since the sum of its digits (51) coincides with the sum of the digits of its prime factors.

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, 39357 + ... + 44139.

It is an arithmetic number, because the mean of its divisors is an integer number (7635264).

Almost surely, 2^199680684 is an apocalyptic number.

199680684 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 199680684, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (274869504).

199680684 is an abundant number, since it is smaller than the sum of its proper divisors (350058324).

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

199680684 is a wasteful number, since it uses less digits than its factorization.

199680684 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4875 (or 4866 counting only the distinct ones).

The product of its (nonzero) digits is 746496, while the sum is 51.

The square root of 199680684 is about 14130.8415885254. The cubic root of 199680684 is about 584.4921533124.

The spelling of 199680684 in words is "one hundred ninety-nine million, six hundred eighty thousand, six hundred eighty-four".