198263506 has 12 divisors (see below), whose sum is σ = 345949758. Its totient is φ = 84970032.

The previous prime is 198263419. The next prime is 198263521. The reversal of 198263506 is 605362891.

It can be written as a sum of positive squares in only one way, i.e., 185368225 + 12895281 = 13615^2 + 3591^2 .

It is a super-2 number, since 2×198263506² = 78616835622824072, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1011451 + ... + 1011646.

Almost surely, 2^198263506 is an apocalyptic number.

198263506 is a deficient number, since it is larger than the sum of its proper divisors (147686252).

198263506 is a wasteful number, since it uses less digits than its factorization.

198263506 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2023113 (or 2023106 counting only the distinct ones).

The product of its (nonzero) digits is 77760, while the sum is 40.

The square root of 198263506 is about 14080.6074442831. The cubic root of 198263506 is about 583.1061123929.

It can be divided in two parts, 19826 and 3506, that added together give a palindrome (23332).

The spelling of 198263506 in words is "one hundred ninety-eight million, two hundred sixty-three thousand, five hundred six".