12808188 has 18 divisors (see below), whose sum is σ = 32376344. Its totient is φ = 4269384.

The previous prime is 12808183. The next prime is 12808193. The reversal of 12808188 is 88180821.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (12808183) and next prime (12808193).

It is a tau number, because it is divible by the number of its divisors (18).

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 355783 = 12808188 / (1 + 2 + 8 + 0 + 8 + 1 + 8 + 8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12808181) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 177856 + ... + 177927.

Almost surely, 2^12808188 is an apocalyptic number.

12808188 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

12808188 is an abundant number, since it is smaller than the sum of its proper divisors (19568156).

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

12808188 is a wasteful number, since it uses less digits than its factorization.

12808188 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 355793 (or 355788 counting only the distinct ones).

The product of its (nonzero) digits is 8192, while the sum is 36.

The square root of 12808188 is about 3578.8528888458. The cubic root of 12808188 is about 233.9712872944.

It can be divided in two parts, 12808 and 188, that added together give a square (12996 = 114²).

The spelling of 12808188 in words is "twelve million, eight hundred eight thousand, one hundred eighty-eight".