12784772 has 96 divisors (see below), whose sum is σ = 31309824. Its totient is φ = 4406400.

The previous prime is 12784771. The next prime is 12784787. The reversal of 12784772 is 27748721.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (12784771) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 124073 + ... + 124175.

It is an arithmetic number, because the mean of its divisors is an integer number (326144).

Almost surely, 2^12784772 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12784772, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15654912).

12784772 is an abundant number, since it is smaller than the sum of its proper divisors (18525052).

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

12784772 is a wasteful number, since it uses less digits than its factorization.

12784772 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 169 (or 167 counting only the distinct ones).

The product of its digits is 43904, while the sum is 38.

The square root of 12784772 is about 3575.5799529587. The cubic root of 12784772 is about 233.8286177830.

The spelling of 12784772 in words is "twelve million, seven hundred eighty-four thousand, seven hundred seventy-two".