198980019 has 24 divisors (see below), whose sum is σ = 347798880. Its totient is φ = 107013888.

The previous prime is 198979993. The next prime is 198980021. The reversal of 198980019 is 910089891.

It is not a de Polignac number, because 198980019 - 2⁸ = 198979763 is a prime.

It is a super-2 number, since 2×198980019² = 79186095922480722, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (198980039) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 91824 + ... + 93965.

It is an arithmetic number, because the mean of its divisors is an integer number (14491620).

Almost surely, 2^198980019 is an apocalyptic number.

198980019 is a deficient number, since it is larger than the sum of its proper divisors (148818861).

198980019 is a wasteful number, since it uses less digits than its factorization.

198980019 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 185819 (or 185816 counting only the distinct ones).

The product of its (nonzero) digits is 46656, while the sum is 45.

The square root of 198980019 is about 14106.0277541199. The cubic root of 198980019 is about 583.8077053064.

The spelling of 198980019 in words is "one hundred ninety-eight million, nine hundred eighty thousand, nineteen".