12785436 has 36 divisors (see below), whose sum is σ = 32432400. Its totient is φ = 4246848.

The previous prime is 12785419. The next prime is 12785449. The reversal of 12785436 is 63458721.

It is a tau number, because it is divible by the number of its divisors (36).

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 12785436.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 15400 + ... + 16208.

It is an arithmetic number, because the mean of its divisors is an integer number (900900).

Almost surely, 2^12785436 is an apocalyptic number.

It is an amenable number.

12785436 is an abundant number, since it is smaller than the sum of its proper divisors (19646964).

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

12785436 is a wasteful number, since it uses less digits than its factorization.

12785436 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1258 (or 1253 counting only the distinct ones).

The product of its digits is 40320, while the sum is 36.

The square root of 12785436 is about 3575.6728038231. The cubic root of 12785436 is about 233.8326658155.

The spelling of 12785436 in words is "twelve million, seven hundred eighty-five thousand, four hundred thirty-six".