206688604 has 12 divisors (see below), whose sum is σ = 361900000. Its totient is φ = 103288608.

The previous prime is 206688491. The next prime is 206688607. The reversal of 206688604 is 406886602.

206688604 is nontrivially palindromic in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (206688607) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 4929 + ... + 20920.

Almost surely, 2^206688604 is an apocalyptic number.

It is an amenable number.

206688604 is a deficient number, since it is larger than the sum of its proper divisors (155211396).

206688604 is a wasteful number, since it uses less digits than its factorization.

206688604 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27852 (or 27850 counting only the distinct ones).

The product of its (nonzero) digits is 110592, while the sum is 40.

The square root of 206688604 is about 14376.6687379240. The cubic root of 206688604 is about 591.2513935130.

The spelling of 206688604 in words is "two hundred six million, six hundred eighty-eight thousand, six hundred four".