199780680 has 96 divisors (see below), whose sum is σ = 658828800. Its totient is φ = 48428160.

The previous prime is 199780631. The next prime is 199780697. The reversal of 199780680 is 86087991.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7641 + ... + 21399.

It is an arithmetic number, because the mean of its divisors is an integer number (6862800).

Almost surely, 2^199780680 is an apocalyptic number.

199780680 is a gapful number since it is divisible by the number (10) 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 199780680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (329414400).

199780680 is an abundant number, since it is smaller than the sum of its proper divisors (459048120).

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

199780680 is a wasteful number, since it uses less digits than its factorization.

199780680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13795 (or 13780 counting only the distinct ones).

The product of its (nonzero) digits is 217728, while the sum is 48.

The square root of 199780680 is about 14134.3793638065. The cubic root of 199780680 is about 584.5897042665.

The spelling of 199780680 in words is "one hundred ninety-nine million, seven hundred eighty thousand, six hundred eighty".