12243838 has 4 divisors (see below), whose sum is σ = 18365760. Its totient is φ = 6121918.

The previous prime is 12243821. The next prime is 12243839. The reversal of 12243838 is 83834221.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 83834221 = 59 ⋅1420919.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12243839) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3060958 + ... + 3060961.

It is an arithmetic number, because the mean of its divisors is an integer number (4591440).

Almost surely, 2^12243838 is an apocalyptic number.

12243838 is a deficient number, since it is larger than the sum of its proper divisors (6121922).

12243838 is an equidigital number, since it uses as much as digits as its factorization.

12243838 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6121921.

The product of its digits is 9216, while the sum is 31.

The square root of 12243838 is about 3499.1196035574. The cubic root of 12243838 is about 230.4831557277.

The spelling of 12243838 in words is "twelve million, two hundred forty-three thousand, eight hundred thirty-eight".