198298697890 has 64 divisors (see below), whose sum is σ = 371907624960. Its totient is φ = 76042653120.

The previous prime is 198298697851. The next prime is 198298697893. The reversal of 198298697890 is 98796892891.

It is not an unprimeable number, because it can be changed into a prime (198298697893) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 29248521 + ... + 29255299.

It is an arithmetic number, because the mean of its divisors is an integer number (5811056640).

Almost surely, 2^198298697890 is an apocalyptic number.

198298697890 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

198298697890 is a deficient number, since it is larger than the sum of its proper divisors (173608927070).

198298697890 is a wasteful number, since it uses less digits than its factorization.

198298697890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7687.

The product of its (nonzero) digits is 282175488, while the sum is 76.

The spelling of 198298697890 in words is "one hundred ninety-eight billion, two hundred ninety-eight million, six hundred ninety-seven thousand, eight hundred ninety".