12389436 has 30 divisors (see below), whose sum is σ = 32389280. Its totient is φ = 4129704.

The previous prime is 12389407. The next prime is 12389437. The reversal of 12389436 is 63498321.

12389436 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an alternating number because its digits alternate between odd and even.

It is a self number, because there is not a number n which added to its sum of digits gives 12389436.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12389437) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 18796 + ... + 19443.

Almost surely, 2^12389436 is an apocalyptic number.

It is an amenable number.

12389436 is an abundant number, since it is smaller than the sum of its proper divisors (19999844).

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

12389436 is a wasteful number, since it uses less digits than its factorization.

12389436 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38255 (or 38244 counting only the distinct ones).

The product of its digits is 31104, while the sum is 36.

The square root of 12389436 is about 3519.8630655183. The cubic root of 12389436 is about 231.3931574265.

The spelling of 12389436 in words is "twelve million, three hundred eighty-nine thousand, four hundred thirty-six".