198044642 has 12 divisors (see below), whose sum is σ = 298765698. Its totient is φ = 98457600.

The previous prime is 198044633. The next prime is 198044663. The reversal of 198044642 is 246440891.

It can be written as a sum of positive squares in 3 ways, for example, as 189640441 + 8404201 = 13771^2 + 2899^2 .

It is a junction number, because it is equal to n+sod(n) for n = 198044596 and 198044605.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 308642 + ... + 309282.

Almost surely, 2^198044642 is an apocalyptic number.

198044642 is a deficient number, since it is larger than the sum of its proper divisors (100721056).

198044642 is an frugal number, since it uses more digits than its factorization.

198044642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1525 (or 884 counting only the distinct ones).

The product of its (nonzero) digits is 55296, while the sum is 38.

The square root of 198044642 is about 14072.8334744642. The cubic root of 198044642 is about 582.8914688813.

The spelling of 198044642 in words is "one hundred ninety-eight million, forty-four thousand, six hundred forty-two".