12406638 has 32 divisors (see below), whose sum is σ = 25557120. Its totient is φ = 4013600.

The previous prime is 12406633. The next prime is 12406649. The reversal of 12406638 is 83660421.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12406631) 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, 35581 + ... + 35927.

It is an arithmetic number, because the mean of its divisors is an integer number (798660).

Almost surely, 2^12406638 is an apocalyptic number.

12406638 is an abundant number, since it is smaller than the sum of its proper divisors (13150482).

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

12406638 is a wasteful number, since it uses less digits than its factorization.

12406638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 512.

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

The square root of 12406638 is about 3522.3057788897. The cubic root of 12406638 is about 231.5001998111.

The spelling of 12406638 in words is "twelve million, four hundred six thousand, six hundred thirty-eight".