12784436 has 12 divisors (see below), whose sum is σ = 25568928. Its totient is φ = 5479032.

The previous prime is 12784433. The next prime is 12784451. The reversal of 12784436 is 63448721.

12784436 is an admirable number.

It is a zygodrome in base 3.

It is a junction number, because it is equal to n+sod(n) for n = 12784396 and 12784405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12784433) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 228266 + ... + 228321.

It is an arithmetic number, because the mean of its divisors is an integer number (2130744).

Almost surely, 2^12784436 is an apocalyptic number.

It is an amenable number.

12784436 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

12784436 is a wasteful number, since it uses less digits than its factorization.

12784436 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 456598 (or 456596 counting only the distinct ones).

The product of its digits is 32256, while the sum is 35.

The square root of 12784436 is about 3575.5329672652. The cubic root of 12784436 is about 233.8265693277.

The spelling of 12784436 in words is "twelve million, seven hundred eighty-four thousand, four hundred thirty-six".