12889438 has 4 divisors (see below), whose sum is σ = 19334160. Its totient is φ = 6444718.

The previous prime is 12889433. The next prime is 12889447. The reversal of 12889438 is 83498821.

It is a semiprime because it is the product of two primes.

It is a super-2 number, since 2×12889438² = 332275223911688, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 12889394 and 12889403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12889433) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3222358 + ... + 3222361.

It is an arithmetic number, because the mean of its divisors is an integer number (4833540).

Almost surely, 2^12889438 is an apocalyptic number.

12889438 is a deficient number, since it is larger than the sum of its proper divisors (6444722).

12889438 is an equidigital number, since it uses as much as digits as its factorization.

12889438 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6444721.

The product of its digits is 110592, while the sum is 43.

The square root of 12889438 is about 3590.1863461386. The cubic root of 12889438 is about 234.4649847776.

The spelling of 12889438 in words is "twelve million, eight hundred eighty-nine thousand, four hundred thirty-eight".