198811520 has 32 divisors (see below), whose sum is σ = 475285320. Its totient is φ = 79524352.

The previous prime is 198811519. The next prime is 198811577. The reversal of 198811520 is 25118891.

198811520 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (32).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 154682 + ... + 155961.

Almost surely, 2^198811520 is an apocalyptic number.

198811520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

198811520 is an abundant number, since it is smaller than the sum of its proper divisors (276473800).

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

198811520 is an equidigital number, since it uses as much as digits as its factorization.

198811520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 310662 (or 310650 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 35.

The square root of 198811520 is about 14100.0539006062. The cubic root of 198811520 is about 583.6428666534.

The spelling of 198811520 in words is "one hundred ninety-eight million, eight hundred eleven thousand, five hundred twenty".