12806816 has 24 divisors (see below), whose sum is σ = 27506304. Its totient is φ = 5821120.

The previous prime is 12806749. The next prime is 12806861. The reversal of 12806816 is 61860821.

It is a Harshad number since it is a multiple of its sum of digits (32).

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, 17840 + ... + 18543.

It is an arithmetic number, because the mean of its divisors is an integer number (1146096).

Almost surely, 2^12806816 is an apocalyptic number.

12806816 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

12806816 is an abundant number, since it is smaller than the sum of its proper divisors (14699488).

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

12806816 is a wasteful number, since it uses less digits than its factorization.

12806816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36404 (or 36396 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 32.

The square root of 12806816 is about 3578.6612021816. The cubic root of 12806816 is about 233.9629327411.

The spelling of 12806816 in words is "twelve million, eight hundred six thousand, eight hundred sixteen".