12886816 has 24 divisors (see below), whose sum is σ = 26864460. Its totient is φ = 6064128.

The previous prime is 12886781. The next prime is 12886843. The reversal of 12886816 is 61868821.

It can be written as a sum of positive squares in 2 ways, for example, as 12531600 + 355216 = 3540^2 + 596^2 .

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, 11301 + ... + 12388.

Almost surely, 2^12886816 is an apocalyptic number.

12886816 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

12886816 is an abundant number, since it is smaller than the sum of its proper divisors (13977644).

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

12886816 is a wasteful number, since it uses less digits than its factorization.

12886816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23716 (or 23708 counting only the distinct ones).

The product of its digits is 36864, while the sum is 40.

The square root of 12886816 is about 3589.8211654621. The cubic root of 12886816 is about 234.4490852253.

The spelling of 12886816 in words is "twelve million, eight hundred eighty-six thousand, eight hundred sixteen".