12009378 has 32 divisors (see below), whose sum is σ = 25583040. Its totient is φ = 3745280.

The previous prime is 12009377. The next prime is 12009379. The reversal of 12009378 is 87390021.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (12009377) and next prime (12009379).

It is not an unprimeable number, because it can be changed into a prime (12009377) 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, 28453 + ... + 28871.

It is an arithmetic number, because the mean of its divisors is an integer number (799470).

Almost surely, 2^12009378 is an apocalyptic number.

12009378 is an abundant number, since it is smaller than the sum of its proper divisors (13573662).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12009378 is a wasteful number, since it uses less digits than its factorization.

12009378 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 722.

The product of its (nonzero) digits is 3024, while the sum is 30.

The square root of 12009378 is about 3465.4549484880. The cubic root of 12009378 is about 229.0024725933.

Adding to 12009378 its reverse (87390021), we get a palindrome (99399399).

The spelling of 12009378 in words is "twelve million, nine thousand, three hundred seventy-eight".