12309638 has 8 divisors (see below), whose sum is σ = 20143080. Its totient is φ = 5595280.

The previous prime is 12309637. The next prime is 12309707. The reversal of 12309638 is 83690321.

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

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12309631) 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 3 ways as a sum of consecutive naturals, for example, 279743 + ... + 279786.

It is an arithmetic number, because the mean of its divisors is an integer number (2517885).

Almost surely, 2^12309638 is an apocalyptic number.

12309638 is a deficient number, since it is larger than the sum of its proper divisors (7833442).

12309638 is a wasteful number, since it uses less digits than its factorization.

12309638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 559542.

The product of its (nonzero) digits is 7776, while the sum is 32.

The square root of 12309638 is about 3508.5093700887. The cubic root of 12309638 is about 230.8953005910.

Adding to 12309638 its reverse (83690321), we get a palindrome (95999959).

The spelling of 12309638 in words is "twelve million, three hundred nine thousand, six hundred thirty-eight".