198663976 has 16 divisors (see below), whose sum is σ = 425708640. Its totient is φ = 85141680.

The previous prime is 198663973. The next prime is 198663977. The reversal of 198663976 is 679366891.

It is not an unprimeable number, because it can be changed into a prime (198663973) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 1773730 + ... + 1773841.

It is an arithmetic number, because the mean of its divisors is an integer number (26606790).

Almost surely, 2^198663976 is an apocalyptic number.

It is an amenable number.

198663976 is an abundant number, since it is smaller than the sum of its proper divisors (227044664).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

198663976 is a wasteful number, since it uses less digits than its factorization.

198663976 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3547584 (or 3547580 counting only the distinct ones).

The product of its digits is 2939328, while the sum is 55.

The square root of 198663976 is about 14094.8208927960. The cubic root of 198663976 is about 583.4984512892.

The spelling of 198663976 in words is "one hundred ninety-eight million, six hundred sixty-three thousand, nine hundred seventy-six".