198419945 has 8 divisors (see below), whose sum is σ = 250635840. Its totient is φ = 150381360.

The previous prime is 198419939. The next prime is 198419957. The reversal of 198419945 is 549914891.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 198419945 - 2¹⁰ = 198418921 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 198419893 and 198419902.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1044221 + ... + 1044410.

It is an arithmetic number, because the mean of its divisors is an integer number (31329480).

Almost surely, 2^198419945 is an apocalyptic number.

It is an amenable number.

198419945 is a deficient number, since it is larger than the sum of its proper divisors (52215895).

198419945 is a wasteful number, since it uses less digits than its factorization.

198419945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2088655.

The product of its digits is 466560, while the sum is 50.

The square root of 198419945 is about 14086.1614714584. The cubic root of 198419945 is about 583.2594378957.

The spelling of 198419945 in words is "one hundred ninety-eight million, four hundred nineteen thousand, nine hundred forty-five".