198749568 has 32 divisors (see below), whose sum is σ = 527929560. Its totient is φ = 66249728.

The previous prime is 198749563. The next prime is 198749627. The reversal of 198749568 is 865947891.

It is a tau number, because it is divible by the number of its divisors (32).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (198749561) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 258405 + ... + 259172.

Almost surely, 2^198749568 is an apocalyptic number.

It is an amenable number.

198749568 is an abundant number, since it is smaller than the sum of its proper divisors (329179992).

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

198749568 is an equidigital number, since it uses as much as digits as its factorization.

198749568 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 517594 (or 517582 counting only the distinct ones).

The product of its digits is 4354560, while the sum is 57.

The square root of 198749568 is about 14097.8568584023. The cubic root of 198749568 is about 583.5822370359.

The spelling of 198749568 in words is "one hundred ninety-eight million, seven hundred forty-nine thousand, five hundred sixty-eight".