198021120 has 208 divisors, whose sum is σ = 693548352. Its totient is φ = 47841280.

The previous prime is 198021107. The next prime is 198021121. The reversal of 198021120 is 21120891.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (198021121) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 675694 + ... + 675986.

Almost surely, 2^198021120 is an apocalyptic number.

198021120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 198021120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (346774176).

198021120 is an abundant number, since it is smaller than the sum of its proper divisors (495527232).

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

198021120 is a wasteful number, since it uses less digits than its factorization.

198021120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 336 (or 314 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 24.

The square root of 198021120 is about 14071.9977259805. The cubic root of 198021120 is about 582.8683910610.

The spelling of 198021120 in words is "one hundred ninety-eight million, twenty-one thousand, one hundred twenty".