12858728 has 16 divisors (see below), whose sum is σ = 24148260. Its totient is φ = 6419200.

The previous prime is 12858719. The next prime is 12858737. The reversal of 12858728 is 82785821.

It is an interprime number because it is at equal distance from previous prime (12858719) and next prime (12858737).

It can be written as a sum of positive squares in 2 ways, for example, as 12802084 + 56644 = 3578^2 + 238^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8768 + ... + 10128.

Almost surely, 2^12858728 is an apocalyptic number.

It is an amenable number.

12858728 is a deficient number, since it is larger than the sum of its proper divisors (11289532).

12858728 is a wasteful number, since it uses less digits than its factorization.

12858728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2548 (or 2544 counting only the distinct ones).

The product of its digits is 71680, while the sum is 41.

The square root of 12858728 is about 3585.9068588016. The cubic root of 12858728 is about 234.2786268783.

The spelling of 12858728 in words is "twelve million, eight hundred fifty-eight thousand, seven hundred twenty-eight".