12428636 has 18 divisors (see below), whose sum is σ = 23908080. Its totient is φ = 5649160.

The previous prime is 12428629. The next prime is 12428639. The reversal of 12428636 is 63682421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12428639) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 12356 + ... + 13323.

Almost surely, 2^12428636 is an apocalyptic number.

It is an amenable number.

12428636 is a deficient number, since it is larger than the sum of its proper divisors (11479444).

12428636 is a wasteful number, since it uses less digits than its factorization.

12428636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25705 (or 25692 counting only the distinct ones).

The product of its digits is 13824, while the sum is 32.

The square root of 12428636 is about 3525.4270663283. The cubic root of 12428636 is about 231.6369420540.

The spelling of 12428636 in words is "twelve million, four hundred twenty-eight thousand, six hundred thirty-six".