199233820 has 24 divisors (see below), whose sum is σ = 436582944. Its totient is φ = 76228416.

The previous prime is 199233817. The next prime is 199233821. The reversal of 199233820 is 28332991.

It is a self number, because there is not a number n which added to its sum of digits gives 199233820.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (199233821) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 216099 + ... + 217018.

It is an arithmetic number, because the mean of its divisors is an integer number (18190956).

Almost surely, 2^199233820 is an apocalyptic number.

199233820 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

199233820 is an abundant number, since it is smaller than the sum of its proper divisors (237349124).

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

199233820 is a wasteful number, since it uses less digits than its factorization.

199233820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 433149 (or 433147 counting only the distinct ones).

The product of its (nonzero) digits is 23328, while the sum is 37.

The square root of 199233820 is about 14115.0210768528. The cubic root of 199233820 is about 584.0558173646.

The spelling of 199233820 in words is "one hundred ninety-nine million, two hundred thirty-three thousand, eight hundred twenty".