198990930 has 16 divisors (see below), whose sum is σ = 477578304. Its totient is φ = 53064240.

The previous prime is 198990929. The next prime is 198990937. The reversal of 198990930 is 39099891.

It is a self number, because there is not a number n which added to its sum of digits gives 198990930.

It is not an unprimeable number, because it can be changed into a prime (198990937) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3316486 + ... + 3316545.

It is an arithmetic number, because the mean of its divisors is an integer number (29848644).

Almost surely, 2^198990930 is an apocalyptic number.

198990930 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

198990930 is an abundant number, since it is smaller than the sum of its proper divisors (278587374).

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

198990930 is a wasteful number, since it uses less digits than its factorization.

198990930 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6633041.

The product of its (nonzero) digits is 157464, while the sum is 48.

The square root of 198990930 is about 14106.4144983763. The cubic root of 198990930 is about 583.8183760754.

The spelling of 198990930 in words is "one hundred ninety-eight million, nine hundred ninety thousand, nine hundred thirty".