12808388 has 6 divisors (see below), whose sum is σ = 22414686. Its totient is φ = 6404192.

The previous prime is 12808387. The next prime is 12808469. The reversal of 12808388 is 88380821.

It can be written as a sum of positive squares in only one way, i.e., 11710084 + 1098304 = 3422^2 + 1048^2 .

It is not an unprimeable number, because it can be changed into a prime (12808381) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1601045 + ... + 1601052.

It is an arithmetic number, because the mean of its divisors is an integer number (3735781).

Almost surely, 2^12808388 is an apocalyptic number.

It is an amenable number.

12808388 is a deficient number, since it is larger than the sum of its proper divisors (9606298).

12808388 is a wasteful number, since it uses less digits than its factorization.

12808388 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3202101 (or 3202099 counting only the distinct ones).

The product of its (nonzero) digits is 24576, while the sum is 38.

The square root of 12808388 is about 3578.8808306508. The cubic root of 12808388 is about 233.9725051095.

The spelling of 12808388 in words is "twelve million, eight hundred eight thousand, three hundred eighty-eight".