238278923 has 4 divisors (see below), whose sum is σ = 238444368. Its totient is φ = 238113480.

The previous prime is 238278917. The next prime is 238278941. The reversal of 238278923 is 329872832.

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 238278923 - 2⁴ = 238278907 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (238278323) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 80543 + ... + 83448.

It is an arithmetic number, because the mean of its divisors is an integer number (59611092).

Almost surely, 2^238278923 is an apocalyptic number.

238278923 is a deficient number, since it is larger than the sum of its proper divisors (165445).

238278923 is a wasteful number, since it uses less digits than its factorization.

238278923 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 165444.

The product of its digits is 290304, while the sum is 44.

The square root of 238278923 is about 15436.2859198708. The cubic root of 238278923 is about 619.9574398465.

The spelling of 238278923 in words is "two hundred thirty-eight million, two hundred seventy-eight thousand, nine hundred twenty-three".