12428784 has 30 divisors (see below), whose sum is σ = 34783736. Its totient is φ = 4142880.

The previous prime is 12428771. The next prime is 12428803. The reversal of 12428784 is 48782421.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 43012 + ... + 43299.

Almost surely, 2^12428784 is an apocalyptic number.

It is an amenable number.

12428784 is an abundant number, since it is smaller than the sum of its proper divisors (22354952).

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

12428784 is a wasteful number, since it uses less digits than its factorization.

12428784 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86325 (or 86316 counting only the distinct ones).

The product of its digits is 28672, while the sum is 36.

The square root of 12428784 is about 3525.4480566305. The cubic root of 12428784 is about 231.6378614934.

The spelling of 12428784 in words is "twelve million, four hundred twenty-eight thousand, seven hundred eighty-four".