198440559 has 6 divisors (see below), whose sum is σ = 286636376. Its totient is φ = 132293700.

The previous prime is 198440549. The next prime is 198440581. The reversal of 198440559 is 955044891.

198440559 is a `hidden beast` number, since 1 + 98 + 4 + 4 + 0 + 559 = 666.

It is not a de Polignac number, because 198440559 - 2¹⁵ = 198407791 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (198440549) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 11024467 + ... + 11024484.

Almost surely, 2^198440559 is an apocalyptic number.

198440559 is a deficient number, since it is larger than the sum of its proper divisors (88195817).

198440559 is a wasteful number, since it uses less digits than its factorization.

198440559 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22048957 (or 22048954 counting only the distinct ones).

The product of its (nonzero) digits is 259200, while the sum is 45.

The square root of 198440559 is about 14086.8931635049. The cubic root of 198440559 is about 583.2796356195.

The spelling of 198440559 in words is "one hundred ninety-eight million, four hundred forty thousand, five hundred fifty-nine".