199680878 has 16 divisors (see below), whose sum is σ = 317402064. Its totient is φ = 93889920.

The previous prime is 199680857. The next prime is 199680881. The reversal of 199680878 is 878086991.

It is a happy number.

199680878 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 79376 + ... + 81852.

It is an arithmetic number, because the mean of its divisors is an integer number (19837629).

Almost surely, 2^199680878 is an apocalyptic number.

199680878 is a deficient number, since it is larger than the sum of its proper divisors (117721186).

199680878 is a wasteful number, since it uses less digits than its factorization.

199680878 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4867.

The product of its (nonzero) digits is 1741824, while the sum is 56.

The square root of 199680878 is about 14130.8484529415. The cubic root of 199680878 is about 584.4923426003.

The spelling of 199680878 in words is "one hundred ninety-nine million, six hundred eighty thousand, eight hundred seventy-eight".