12304138 has 32 divisors (see below), whose sum is σ = 23253120. Its totient is φ = 4743360.

The previous prime is 12304133. The next prime is 12304139. The reversal of 12304138 is 83140321.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is not an unprimeable number, because it can be changed into a prime (12304133) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16420 + ... + 17152.

It is an arithmetic number, because the mean of its divisors is an integer number (726660).

Almost surely, 2^12304138 is an apocalyptic number.

12304138 is a deficient number, since it is larger than the sum of its proper divisors (10948982).

12304138 is a wasteful number, since it uses less digits than its factorization.

12304138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 862.

The product of its (nonzero) digits is 576, while the sum is 22.

The square root of 12304138 is about 3507.7254738648. The cubic root of 12304138 is about 230.8609071253.

Adding to 12304138 its reverse (83140321), we get a palindrome (95444459).

The spelling of 12304138 in words is "twelve million, three hundred four thousand, one hundred thirty-eight".