199230728 has 16 divisors (see below), whose sum is σ = 379890000. Its totient is φ = 97926736.

The previous prime is 199230727. The next prime is 199230809. The reversal of 199230728 is 827032991.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (199230727) 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, 210578 + ... + 211521.

It is an arithmetic number, because the mean of its divisors is an integer number (23743125).

Almost surely, 2^199230728 is an apocalyptic number.

It is an amenable number.

199230728 is a deficient number, since it is larger than the sum of its proper divisors (180659272).

199230728 is a wasteful number, since it uses less digits than its factorization.

199230728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 422164 (or 422160 counting only the distinct ones).

The product of its (nonzero) digits is 54432, while the sum is 41.

The square root of 199230728 is about 14114.9115477214. The cubic root of 199230728 is about 584.0527959400.

The spelling of 199230728 in words is "one hundred ninety-nine million, two hundred thirty thousand, seven hundred twenty-eight".