12172808 has 32 divisors (see below), whose sum is σ = 23976000. Its totient is φ = 5785920.

The previous prime is 12172807. The next prime is 12172813. The reversal of 12172808 is 80827121.

12172808 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (29).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12172807) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16103 + ... + 16841.

It is an arithmetic number, because the mean of its divisors is an integer number (749250).

Almost surely, 2^12172808 is an apocalyptic number.

It is an amenable number.

12172808 is a deficient number, since it is larger than the sum of its proper divisors (11803192).

12172808 is a wasteful number, since it uses less digits than its factorization.

12172808 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 845 (or 841 counting only the distinct ones).

The product of its (nonzero) digits is 1792, while the sum is 29.

The square root of 12172808 is about 3488.9551444523. The cubic root of 12172808 is about 230.0365915317.

Adding to 12172808 its reverse (80827121), we get a palindrome (92999929).

The spelling of 12172808 in words is "twelve million, one hundred seventy-two thousand, eight hundred eight".