223838 has 4 divisors (see below), whose sum is σ = 335760. Its totient is φ = 111918.

The previous prime is 223837. The next prime is 223841. The reversal of 223838 is 838322.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 838322 = 2 ⋅419161.

It is a Curzon number.

It is a nialpdrome in base 12.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (223831) 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 as a sum of consecutive naturals, namely, 55958 + ... + 55961.

It is an arithmetic number, because the mean of its divisors is an integer number (83940).

2²²³⁸³⁸ is an apocalyptic number.

223838 is a deficient number, since it is larger than the sum of its proper divisors (111922).

223838 is a wasteful number, since it uses less digits than its factorization.

223838 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 111921.

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

The square root of 223838 is about 473.1152079568. The cubic root of 223838 is about 60.7171352098.

The spelling of 223838 in words is "two hundred twenty-three thousand, eight hundred thirty-eight".