198921096 has 240 divisors, whose sum is σ = 637282800. Its totient is φ = 57879360.

The previous prime is 198921091. The next prime is 198921133. The reversal of 198921096 is 690129891.

It is not an unprimeable number, because it can be changed into a prime (198921091) by changing a digit.

It is a polite number, since it can be written in 59 ways as a sum of consecutive naturals, for example, 3371515 + ... + 3371573.

It is an arithmetic number, because the mean of its divisors is an integer number (2655345).

Almost surely, 2^198921096 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 198921096, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (318641400).

198921096 is an abundant number, since it is smaller than the sum of its proper divisors (438361704).

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

198921096 is a wasteful number, since it uses less digits than its factorization.

198921096 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 142 (or 118 counting only the distinct ones).

The product of its (nonzero) digits is 69984, while the sum is 45.

The square root of 198921096 is about 14103.9390242584. The cubic root of 198921096 is about 583.7500728907.

The spelling of 198921096 in words is "one hundred ninety-eight million, nine hundred twenty-one thousand, ninety-six".