238634209 has 8 divisors (see below), whose sum is σ = 262054080. Its totient is φ = 215502000.

The previous prime is 238634203. The next prime is 238634237. The reversal of 238634209 is 902436832.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-238634209 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (238634203) 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 7 ways as a sum of consecutive naturals, for example, 70174 + ... + 73495.

It is an arithmetic number, because the mean of its divisors is an integer number (32756760).

Almost surely, 2^238634209 is an apocalyptic number.

It is an amenable number.

238634209 is a deficient number, since it is larger than the sum of its proper divisors (23419871).

238634209 is a wasteful number, since it uses less digits than its factorization.

238634209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 143831.

The product of its (nonzero) digits is 62208, while the sum is 37.

The square root of 238634209 is about 15447.7897771817. The cubic root of 238634209 is about 620.2654161916.

The spelling of 238634209 in words is "two hundred thirty-eight million, six hundred thirty-four thousand, two hundred nine".