12366440 has 32 divisors (see below), whose sum is σ = 28109160. Its totient is φ = 4896000.

The previous prime is 12366421. The next prime is 12366449. The reversal of 12366440 is 4466321.

12366440 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 12208036 + 158404 = 3494^2 + 398^2 .

It is not an unprimeable number, because it can be changed into a prime (12366449) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2510 + ... + 5570.

Almost surely, 2^12366440 is an apocalyptic number.

12366440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12366440 is an abundant number, since it is smaller than the sum of its proper divisors (15742720).

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

12366440 is a wasteful number, since it uses less digits than its factorization.

12366440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3173 (or 3169 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 26.

The square root of 12366440 is about 3516.5949439763. The cubic root of 12366440 is about 231.2499060141.

The spelling of 12366440 in words is "twelve million, three hundred sixty-six thousand, four hundred forty".