199047820 has 48 divisors (see below), whose sum is σ = 431101440. Its totient is φ = 77157824.

The previous prime is 199047803. The next prime is 199047829. The reversal of 199047820 is 28740991.

It is not an unprimeable number, because it can be changed into a prime (199047829) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 99591 + ... + 101569.

It is an arithmetic number, because the mean of its divisors is an integer number (8981280).

Almost surely, 2^199047820 is an apocalyptic number.

199047820 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

199047820 is an abundant number, since it is smaller than the sum of its proper divisors (232053620).

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

199047820 is a wasteful number, since it uses less digits than its factorization.

199047820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2142 (or 2140 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 40.

The square root of 199047820 is about 14108.4308128154. The cubic root of 199047820 is about 583.8740071918.

The spelling of 199047820 in words is "one hundred ninety-nine million, forty-seven thousand, eight hundred twenty".