12787428 has 24 divisors (see below), whose sum is σ = 29952832. Its totient is φ = 4245984.

The previous prime is 12787427. The next prime is 12787429. The reversal of 12787428 is 82478721.

12787428 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (12787427) and next prime (12787429).

It is not an unprimeable number, because it can be changed into a prime (12787421) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1401 + ... + 5247.

Almost surely, 2^12787428 is an apocalyptic number.

It is an amenable number.

12787428 is an abundant number, since it is smaller than the sum of its proper divisors (17165404).

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

12787428 is a wasteful number, since it uses less digits than its factorization.

12787428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4131 (or 4129 counting only the distinct ones).

The product of its digits is 50176, while the sum is 39.

The square root of 12787428 is about 3575.9513419508. The cubic root of 12787428 is about 233.8448090718.

The spelling of 12787428 in words is "twelve million, seven hundred eighty-seven thousand, four hundred twenty-eight".