12172008 has 32 divisors (see below), whose sum is σ = 32032800. Its totient is φ = 3843648.

The previous prime is 12172003. The next prime is 12172019. The reversal of 12172008 is 80027121.

It is not an unprimeable number, because it can be changed into a prime (12172003) 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, 12891 + ... + 13802.

It is an arithmetic number, because the mean of its divisors is an integer number (1001025).

Almost surely, 2^12172008 is an apocalyptic number.

It is an amenable number.

12172008 is an abundant number, since it is smaller than the sum of its proper divisors (19860792).

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

12172008 is a wasteful number, since it uses less digits than its factorization.

12172008 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26721 (or 26717 counting only the distinct ones).

The product of its (nonzero) digits is 224, while the sum is 21.

The square root of 12172008 is about 3488.8404950642. The cubic root of 12172008 is about 230.0315520671.

Adding to 12172008 its reverse (80027121), we get a palindrome (92199129).

The spelling of 12172008 in words is "twelve million, one hundred seventy-two thousand, eight".