12864428 has 6 divisors (see below), whose sum is σ = 22512756. Its totient is φ = 6432212.

The previous prime is 12864421. The next prime is 12864443. The reversal of 12864428 is 82446821.

It is not an unprimeable number, because it can be changed into a prime (12864421) by changing a digit.

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 as a sum of consecutive naturals, namely, 1608050 + ... + 1608057.

It is an arithmetic number, because the mean of its divisors is an integer number (3752126).

Almost surely, 2^12864428 is an apocalyptic number.

It is an amenable number.

12864428 is a deficient number, since it is larger than the sum of its proper divisors (9648328).

12864428 is a wasteful number, since it uses less digits than its factorization.

12864428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3216111 (or 3216109 counting only the distinct ones).

The product of its digits is 24576, while the sum is 35.

The square root of 12864428 is about 3586.7015487771. The cubic root of 12864428 is about 234.3132386716.

The spelling of 12864428 in words is "twelve million, eight hundred sixty-four thousand, four hundred twenty-eight".