198399900 has 72 divisors (see below), whose sum is σ = 604266880. Its totient is φ = 50120640.

The previous prime is 198399871. The next prime is 198399917. The reversal of 198399900 is 9993891.

It is a self number, because there is not a number n which added to its sum of digits gives 198399900.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 11704 + ... + 23103.

Almost surely, 2^198399900 is an apocalyptic number.

198399900 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

198399900 is an abundant number, since it is smaller than the sum of its proper divisors (405866980).

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

198399900 is a wasteful number, since it uses less digits than its factorization.

198399900 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34843 (or 34836 counting only the distinct ones).

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

The square root of 198399900 is about 14085.4499395653. The cubic root of 198399900 is about 583.2397963401.

The spelling of 198399900 in words is "one hundred ninety-eight million, three hundred ninety-nine thousand, nine hundred".