12009678 has 16 divisors (see below), whose sum is σ = 24067920. Its totient is φ = 3995136.

The previous prime is 12009643. The next prime is 12009707. The reversal of 12009678 is 87690021.

12009678 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1728 + ... + 5196.

It is an arithmetic number, because the mean of its divisors is an integer number (1504245).

Almost surely, 2^12009678 is an apocalyptic number.

12009678 is an abundant number, since it is smaller than the sum of its proper divisors (12058242).

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

12009678 is a wasteful number, since it uses less digits than its factorization.

12009678 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4051.

The product of its (nonzero) digits is 6048, while the sum is 33.

The square root of 12009678 is about 3465.4982325778. The cubic root of 12009678 is about 229.0043794412.

Adding to 12009678 its reverse (87690021), we get a palindrome (99699699).

It can be divided in two parts, 1200 and 9678, that added together give a triangular number (10878 = T₁₄₇).

The spelling of 12009678 in words is "twelve million, nine thousand, six hundred seventy-eight".