238218609 has 8 divisors (see below), whose sum is σ = 317931232. Its totient is φ = 158659200.

The previous prime is 238218583. The next prime is 238218611. The reversal of 238218609 is 906812832.

It is a happy number.

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

It is a de Polignac number, because none of the positive numbers 2^k-238218609 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (238218509) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 34624 + ... + 40929.

It is an arithmetic number, because the mean of its divisors is an integer number (39741404).

Almost surely, 2^238218609 is an apocalyptic number.

It is an amenable number.

238218609 is a deficient number, since it is larger than the sum of its proper divisors (79712623).

238218609 is a wasteful number, since it uses less digits than its factorization.

238218609 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76607.

The product of its (nonzero) digits is 41472, while the sum is 39.

The square root of 238218609 is about 15434.3321527042. The cubic root of 238218609 is about 619.9051268290.

The spelling of 238218609 in words is "two hundred thirty-eight million, two hundred eighteen thousand, six hundred nine".