12660438 has 32 divisors (see below), whose sum is σ = 29723904. Its totient is φ = 3519072.

The previous prime is 12660421. The next prime is 12660457. The reversal of 12660438 is 83406621.

12660438 is digitally balanced in base 2 and base 4, because in such bases 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 15 ways as a sum of consecutive naturals, for example, 2520 + ... + 5627.

It is an arithmetic number, because the mean of its divisors is an integer number (928872).

Almost surely, 2^12660438 is an apocalyptic number.

12660438 is an abundant number, since it is smaller than the sum of its proper divisors (17063466).

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

12660438 is a wasteful number, since it uses less digits than its factorization.

12660438 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8196.

The product of its (nonzero) digits is 6912, while the sum is 30.

The square root of 12660438 is about 3558.1509242864. The cubic root of 12660438 is about 233.0681399804.

The spelling of 12660438 in words is "twelve million, six hundred sixty thousand, four hundred thirty-eight".