12808845 has 72 divisors (see below), whose sum is σ = 26693784. Its totient is φ = 5660928.

The previous prime is 12808843. The next prime is 12808847. The reversal of 12808845 is 54880821.

12808845 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (12808843) and next prime (12808847).

It can be written as a sum of positive squares in 4 ways, for example, as 2350089 + 10458756 = 1533^2 + 3234^2 .

It is not a de Polignac number, because 12808845 - 2¹ = 12808843 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12808843) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 81507 + ... + 81663.

It is an arithmetic number, because the mean of its divisors is an integer number (370747).

Almost surely, 2^12808845 is an apocalyptic number.

12808845 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

12808845 is an abundant number, since it is smaller than the sum of its proper divisors (13884939).

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

12808845 is a wasteful number, since it uses less digits than its factorization.

12808845 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 219 (or 209 counting only the distinct ones).

The product of its (nonzero) digits is 20480, while the sum is 36.

The square root of 12808845 is about 3578.9446768566. The cubic root of 12808845 is about 233.9752877694.

The spelling of 12808845 in words is "twelve million, eight hundred eight thousand, eight hundred forty-five".