12022438 has 4 divisors (see below), whose sum is σ = 18033660. Its totient is φ = 6011218.

The previous prime is 12022433. The next prime is 12022441. The reversal of 12022438 is 83422021.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 83422021 = 43 ⋅1940047.

It is a Smith number, since the sum of its digits (22) 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 (12022433) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3005608 + ... + 3005611.

It is an arithmetic number, because the mean of its divisors is an integer number (4508415).

Almost surely, 2^12022438 is an apocalyptic number.

12022438 is a deficient number, since it is larger than the sum of its proper divisors (6011222).

12022438 is an equidigital number, since it uses as much as digits as its factorization.

12022438 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6011221.

The product of its (nonzero) digits is 768, while the sum is 22.

The square root of 12022438 is about 3467.3387489543. The cubic root of 12022438 is about 229.0854546542.

Adding to 12022438 its reverse (83422021), we get a palindrome (95444459).

The spelling of 12022438 in words is "twelve million, twenty-two thousand, four hundred thirty-eight".