198438466 has 16 divisors (see below), whose sum is σ = 303797304. Its totient is φ = 97179264.

The previous prime is 198438463. The next prime is 198438469. The reversal of 198438466 is 664834891.

It is an interprime number because it is at equal distance from previous prime (198438463) and next prime (198438469).

It can be written as a sum of positive squares in 4 ways, for example, as 196812841 + 1625625 = 14029^2 + 1275^2 .

It is not an unprimeable number, because it can be changed into a prime (198438463) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 79006 + ... + 81478.

Almost surely, 2^198438466 is an apocalyptic number.

198438466 is a deficient number, since it is larger than the sum of its proper divisors (105358838).

198438466 is a wasteful number, since it uses less digits than its factorization.

198438466 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3285.

The product of its digits is 995328, while the sum is 49.

The square root of 198438466 is about 14086.8188743946. The cubic root of 198438466 is about 583.2775849490.

The spelling of 198438466 in words is "one hundred ninety-eight million, four hundred thirty-eight thousand, four hundred sixty-six".