12138044 has 6 divisors (see below), whose sum is σ = 21241584. Its totient is φ = 6069020.

The previous prime is 12138029. The next prime is 12138047. The reversal of 12138044 is 44083121.

It is a super-2 number, since 2×12138044² = 294664224291872, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12138047) 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, 1517252 + ... + 1517259.

It is an arithmetic number, because the mean of its divisors is an integer number (3540264).

Almost surely, 2^12138044 is an apocalyptic number.

It is an amenable number.

12138044 is a deficient number, since it is larger than the sum of its proper divisors (9103540).

12138044 is a wasteful number, since it uses less digits than its factorization.

12138044 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3034515 (or 3034513 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 23.

The square root of 12138044 is about 3483.9695750681. The cubic root of 12138044 is about 229.8173975991.

The spelling of 12138044 in words is "twelve million, one hundred thirty-eight thousand, forty-four".