198516920 has 32 divisors (see below), whose sum is σ = 510472800. Its totient is φ = 68062848.

The previous prime is 198516917. The next prime is 198516937. The reversal of 198516920 is 29615891.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 354215 + ... + 354774.

It is an arithmetic number, because the mean of its divisors is an integer number (15952275).

Almost surely, 2^198516920 is an apocalyptic number.

198516920 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

198516920 is an abundant number, since it is smaller than the sum of its proper divisors (311955880).

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

198516920 is a wasteful number, since it uses less digits than its factorization.

198516920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 709007 (or 709003 counting only the distinct ones).

The product of its (nonzero) digits is 38880, while the sum is 41.

The square root of 198516920 is about 14089.6032591411. The cubic root of 198516920 is about 583.3544424107.

The spelling of 198516920 in words is "one hundred ninety-eight million, five hundred sixteen thousand, nine hundred twenty".