206345404 has 12 divisors (see below), whose sum is σ = 363192984. Its totient is φ = 102575984.

The previous prime is 206345389. The next prime is 206345407. The reversal of 206345404 is 404543602.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (206345407) 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, 148402 + ... + 149785.

It is an arithmetic number, because the mean of its divisors is an integer number (30266082).

Almost surely, 2^206345404 is an apocalyptic number.

It is an amenable number.

206345404 is a deficient number, since it is larger than the sum of its proper divisors (156847580).

206345404 is a wasteful number, since it uses less digits than its factorization.

206345404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 298364 (or 298362 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 28.

The square root of 206345404 is about 14364.7277732646. The cubic root of 206345404 is about 590.9239606974.

The spelling of 206345404 in words is "two hundred six million, three hundred forty-five thousand, four hundred four".