12428238 has 8 divisors (see below), whose sum is σ = 24856488. Its totient is φ = 4142744.

The previous prime is 12428237. The next prime is 12428243. The reversal of 12428238 is 83282421.

It is a sphenic number, since it is the product of 3 distinct primes.

12428238 is an admirable number.

It is a super-2 number, since 2×12428238² = 308922199569288, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12428233) 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, 1035681 + ... + 1035692.

It is an arithmetic number, because the mean of its divisors is an integer number (3107061).

Almost surely, 2^12428238 is an apocalyptic number.

12428238 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12428238 is a wasteful number, since it uses less digits than its factorization.

12428238 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2071378.

The product of its digits is 6144, while the sum is 30.

The square root of 12428238 is about 3525.3706188144. The cubic root of 12428238 is about 231.6344694714.

The spelling of 12428238 in words is "twelve million, four hundred twenty-eight thousand, two hundred thirty-eight".