197808208 has 20 divisors (see below), whose sum is σ = 412734868. Its totient is φ = 91296000.

The previous prime is 197808167. The next prime is 197808223. The reversal of 197808208 is 802808791.

It can be written as a sum of positive squares in 2 ways, for example, as 8690704 + 189117504 = 2948^2 + 13752^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 475293 + ... + 475708.

Almost surely, 2^197808208 is an apocalyptic number.

It is an amenable number.

197808208 is an abundant number, since it is smaller than the sum of its proper divisors (214926660).

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

197808208 is a wasteful number, since it uses less digits than its factorization.

197808208 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 951022 (or 951016 counting only the distinct ones).

The product of its (nonzero) digits is 64512, while the sum is 43.

The square root of 197808208 is about 14064.4305963661. The cubic root of 197808208 is about 582.6594164178.

The spelling of 197808208 in words is "one hundred ninety-seven million, eight hundred eight thousand, two hundred eight".