198021928384 has 28 divisors (see below), whose sum is σ = 449085445744. Its totient is φ = 84866540544.

The previous prime is 198021928339. The next prime is 198021928399. The reversal of 198021928384 is 483829120891.

It is a tau number, because it is divible by the number of its divisors (28).

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 3 ways as a sum of consecutive naturals, for example, 221006169 + ... + 221007064.

Almost surely, 2^198021928384 is an apocalyptic number.

198021928384 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

198021928384 is an abundant number, since it is smaller than the sum of its proper divisors (251063517360).

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

198021928384 is an equidigital number, since it uses as much as digits as its factorization.

198021928384 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 442013252 (or 442013242 counting only the distinct ones).

The product of its (nonzero) digits is 1990656, while the sum is 55.

The spelling of 198021928384 in words is "one hundred ninety-eight billion, twenty-one million, nine hundred twenty-eight thousand, three hundred eighty-four".