238638319 has 4 divisors (see below), whose sum is σ = 239096880. Its totient is φ = 238179760.

The previous prime is 238638311. The next prime is 238638343. The reversal of 238638319 is 913836832.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 238638319 - 2³ = 238638311 is a prime.

It is a super-2 number, since 2×238638319² = 113896494590291522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (238638311) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 228499 + ... + 229540.

It is an arithmetic number, because the mean of its divisors is an integer number (59774220).

Almost surely, 2^238638319 is an apocalyptic number.

238638319 is a deficient number, since it is larger than the sum of its proper divisors (458561).

238638319 is an equidigital number, since it uses as much as digits as its factorization.

238638319 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 458560.

The product of its digits is 186624, while the sum is 43.

The square root of 238638319 is about 15447.9228053483. The cubic root of 238638319 is about 620.2689771176.

The spelling of 238638319 in words is "two hundred thirty-eight million, six hundred thirty-eight thousand, three hundred nineteen".