209426244 has 12 divisors (see below), whose sum is σ = 488661264. Its totient is φ = 69808744.

The previous prime is 209426233. The next prime is 209426299. The reversal of 209426244 is 442624902.

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8726082 + ... + 8726105.

It is an arithmetic number, because the mean of its divisors is an integer number (40721772).

Almost surely, 2^209426244 is an apocalyptic number.

It is an amenable number.

209426244 is an abundant number, since it is smaller than the sum of its proper divisors (279235020).

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

209426244 is a wasteful number, since it uses less digits than its factorization.

209426244 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17452194 (or 17452192 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 33.

The square root of 209426244 is about 14471.5667431001. The cubic root of 209426244 is about 593.8503744027.

The spelling of 209426244 in words is "two hundred nine million, four hundred twenty-six thousand, two hundred forty-four".