12840008 has 8 divisors (see below), whose sum is σ = 24075030. Its totient is φ = 6420000.

The previous prime is 12840007. The next prime is 12840013. The reversal of 12840008 is 80004821.

It can be written as a sum of positive squares in only one way, i.e., 8421604 + 4418404 = 2902^2 + 2102^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (12840001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 802493 + ... + 802508.

Almost surely, 2^12840008 is an apocalyptic number.

It is an amenable number.

12840008 is a deficient number, since it is larger than the sum of its proper divisors (11235022).

12840008 is a wasteful number, since it uses less digits than its factorization.

12840008 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1605007 (or 1605003 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 23.

The square root of 12840008 is about 3583.2956897248. The cubic root of 12840008 is about 234.1648824530.

Adding to 12840008 its reverse (80004821), we get a palindrome (92844829).

The spelling of 12840008 in words is "twelve million, eight hundred forty thousand, eight".