238823 has 4 divisors (see below), whose sum is σ = 257208. Its totient is φ = 220440.

The previous prime is 238801. The next prime is 238829. The reversal of 238823 is 328832.

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 238823 - 2⁶ = 238759 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 238792 and 238801.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (238829) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9173 + ... + 9198.

It is an arithmetic number, because the mean of its divisors is an integer number (64302).

2²³⁸⁸²³ is an apocalyptic number.

238823 is a deficient number, since it is larger than the sum of its proper divisors (18385).

238823 is a wasteful number, since it uses less digits than its factorization.

238823 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18384.

The product of its digits is 2304, while the sum is 26.

The square root of 238823 is about 488.6952015316. The cubic root of 238823 is about 62.0428943544.

Subtracting 238823 from its reverse (328832), we obtain a palindrome (90009).

The spelling of 238823 in words is "two hundred thirty-eight thousand, eight hundred twenty-three".