198644920 has 16 divisors (see below), whose sum is σ = 446951160. Its totient is φ = 79457952.

The previous prime is 198644911. The next prime is 198644923. The reversal of 198644920 is 29446891.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (198644923) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2483022 + ... + 2483101.

Almost surely, 2^198644920 is an apocalyptic number.

198644920 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

198644920 is an abundant number, since it is smaller than the sum of its proper divisors (248306240).

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

198644920 is a wasteful number, since it uses less digits than its factorization.

198644920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4966134 (or 4966130 counting only the distinct ones).

The product of its (nonzero) digits is 124416, while the sum is 43.

The square root of 198644920 is about 14094.1448836033. The cubic root of 198644920 is about 583.4797941539.

The spelling of 198644920 in words is "one hundred ninety-eight million, six hundred forty-four thousand, nine hundred twenty".