12816578 has 24 divisors (see below), whose sum is σ = 20530944. Its totient is φ = 5994000.

The previous prime is 12816577. The next prime is 12816581. The reversal of 12816578 is 87561821.

It is not an unprimeable number, because it can be changed into a prime (12816577) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 84803 + ... + 84953.

It is an arithmetic number, because the mean of its divisors is an integer number (855456).

Almost surely, 2^12816578 is an apocalyptic number.

12816578 is a deficient number, since it is larger than the sum of its proper divisors (7714366).

12816578 is a wasteful number, since it uses less digits than its factorization.

12816578 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 258 (or 221 counting only the distinct ones).

The product of its digits is 26880, while the sum is 38.

The square root of 12816578 is about 3580.0248602489. The cubic root of 12816578 is about 234.0223637525.

The spelling of 12816578 in words is "twelve million, eight hundred sixteen thousand, five hundred seventy-eight".