199680856 has 16 divisors (see below), whose sum is σ = 374675400. Its totient is φ = 99767424.

The previous prime is 199680851. The next prime is 199680857. The reversal of 199680856 is 658086991.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (199680851) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3531 + ... + 20293.

Almost surely, 2^199680856 is an apocalyptic number.

It is an amenable number.

199680856 is a deficient number, since it is larger than the sum of its proper divisors (174994544).

199680856 is a wasteful number, since it uses less digits than its factorization.

199680856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18258 (or 18254 counting only the distinct ones).

The product of its (nonzero) digits is 933120, while the sum is 52.

The square root of 199680856 is about 14130.8476745028. The cubic root of 199680856 is about 584.4923211347.

The spelling of 199680856 in words is "one hundred ninety-nine million, six hundred eighty thousand, eight hundred fifty-six".