12279918 has 32 divisors (see below), whose sum is σ = 28431360. Its totient is φ = 3463200.

The previous prime is 12279901. The next prime is 12279919. The reversal of 12279918 is 81997221.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12279919) 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 15 ways as a sum of consecutive naturals, for example, 1468 + ... + 5168.

It is an arithmetic number, because the mean of its divisors is an integer number (888480).

Almost surely, 2^12279918 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12279918, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14215680).

12279918 is an abundant number, since it is smaller than the sum of its proper divisors (16151442).

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

12279918 is a wasteful number, since it uses less digits than its factorization.

12279918 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3792.

The product of its digits is 18144, while the sum is 39.

The square root of 12279918 is about 3504.2713935995. The cubic root of 12279918 is about 230.7093287428.

The spelling of 12279918 in words is "twelve million, two hundred seventy-nine thousand, nine hundred eighteen".