12880018 has 16 divisors (see below), whose sum is σ = 19686240. Its totient is φ = 6319296.

The previous prime is 12880009. The next prime is 12880019. The reversal of 12880018 is 81008821.

It is not an unprimeable number, because it can be changed into a prime (12880019) 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, 29530 + ... + 29962.

It is an arithmetic number, because the mean of its divisors is an integer number (1230390).

Almost surely, 2^12880018 is an apocalyptic number.

12880018 is a deficient number, since it is larger than the sum of its proper divisors (6806222).

12880018 is a wasteful number, since it uses less digits than its factorization.

12880018 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 681.

The product of its (nonzero) digits is 1024, while the sum is 28.

The square root of 12880018 is about 3588.8741967364. The cubic root of 12880018 is about 234.4078527696.

Adding to 12880018 its reverse (81008821), we get a palindrome (93888839).

The spelling of 12880018 in words is "twelve million, eight hundred eighty thousand, eighteen".