12867728 has 20 divisors (see below), whose sum is σ = 25736448. Its totient is φ = 6226080.

The previous prime is 12867721. The next prime is 12867761. The reversal of 12867728 is 82776821.

12867728 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (12867721) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12476 + ... + 13467.

Almost surely, 2^12867728 is an apocalyptic number.

It is an amenable number.

12867728 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

12867728 is a wasteful number, since it uses less digits than its factorization.

12867728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25982 (or 25976 counting only the distinct ones).

The product of its digits is 75264, while the sum is 41.

The square root of 12867728 is about 3587.1615519795. The cubic root of 12867728 is about 234.3332724054. Note that the first 3 decimals are identical.

The spelling of 12867728 in words is "twelve million, eight hundred sixty-seven thousand, seven hundred twenty-eight".