206626404 has 12 divisors (see below), whose sum is σ = 482128304. Its totient is φ = 68875464.

The previous prime is 206626373. The next prime is 206626423. The reversal of 206626404 is 404626602.

It is a tau number, because it is divible by the number of its divisors (12).

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 3 ways as a sum of consecutive naturals, for example, 8609422 + ... + 8609445.

Almost surely, 2^206626404 is an apocalyptic number.

It is an amenable number.

206626404 is an abundant number, since it is smaller than the sum of its proper divisors (275501900).

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

206626404 is a wasteful number, since it uses less digits than its factorization.

206626404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17218874 (or 17218872 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 30.

The square root of 206626404 is about 14374.5053480111. The cubic root of 206626404 is about 591.1920779925.

The spelling of 206626404 in words is "two hundred six million, six hundred twenty-six thousand, four hundred four".