199808530 has 32 divisors (see below), whose sum is σ = 369230400. Its totient is φ = 77808192.

The previous prime is 199808513. The next prime is 199808533. The reversal of 199808530 is 35808991.

199808530 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (43).

It is not an unprimeable number, because it can be changed into a prime (199808533) 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, 179616 + ... + 180724.

It is an arithmetic number, because the mean of its divisors is an integer number (11538450).

Almost surely, 2^199808530 is an apocalyptic number.

199808530 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

199808530 is a deficient number, since it is larger than the sum of its proper divisors (169421870).

199808530 is a wasteful number, since it uses less digits than its factorization.

199808530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1578.

The product of its (nonzero) digits is 77760, while the sum is 43.

The square root of 199808530 is about 14135.3645159932. The cubic root of 199808530 is about 584.6168674984.

The spelling of 199808530 in words is "one hundred ninety-nine million, eight hundred eight thousand, five hundred thirty".