12378443 has 16 divisors (see below), whose sum is σ = 16247040. Its totient is φ = 9136800.

The previous prime is 12378427. The next prime is 12378449. The reversal of 12378443 is 34487321.

It is a cyclic number.

It is not a de Polignac number, because 12378443 - 2⁴ = 12378427 is a prime.

It is a super-2 number, since 2×12378443² = 306451702208498, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12378449) 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 in 15 ways as a sum of consecutive naturals, for example, 2768 + ... + 5693.

It is an arithmetic number, because the mean of its divisors is an integer number (1015440).

Almost surely, 2^12378443 is an apocalyptic number.

12378443 is a deficient number, since it is larger than the sum of its proper divisors (3868597).

12378443 is a wasteful number, since it uses less digits than its factorization.

12378443 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8498.

The product of its digits is 16128, while the sum is 32.

The square root of 12378443 is about 3518.3011525451. The cubic root of 12378443 is about 231.3246997048.

It can be divided in two parts, 12378 and 443, that added together give a palindrome (12821).

The spelling of 12378443 in words is "twelve million, three hundred seventy-eight thousand, four hundred forty-three".