199680828 has 12 divisors (see below), whose sum is σ = 465921960. Its totient is φ = 66560272.

The previous prime is 199680809. The next prime is 199680851. The reversal of 199680828 is 828086991.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8320023 + ... + 8320046.

It is an arithmetic number, because the mean of its divisors is an integer number (38826830).

Almost surely, 2^199680828 is an apocalyptic number.

It is an amenable number.

199680828 is an abundant number, since it is smaller than the sum of its proper divisors (266241132).

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

199680828 is a wasteful number, since it uses less digits than its factorization.

199680828 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16640076 (or 16640074 counting only the distinct ones).

The product of its (nonzero) digits is 497664, while the sum is 51.

The square root of 199680828 is about 14130.8466837624. The cubic root of 199680828 is about 584.4922938148.

The spelling of 199680828 in words is "one hundred ninety-nine million, six hundred eighty thousand, eight hundred twenty-eight".