12818140 has 12 divisors (see below), whose sum is σ = 26918136. Its totient is φ = 5127248.

The previous prime is 12818123. The next prime is 12818161. The reversal of 12818140 is 4181821.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 320434 + ... + 320473.

It is an arithmetic number, because the mean of its divisors is an integer number (2243178).

Almost surely, 2^12818140 is an apocalyptic number.

12818140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12818140 is an abundant number, since it is smaller than the sum of its proper divisors (14099996).

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

12818140 is a wasteful number, since it uses less digits than its factorization.

12818140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 640916 (or 640914 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 25.

The square root of 12818140 is about 3580.2430085121. The cubic root of 12818140 is about 234.0318704004.

Adding to 12818140 its reverse (4181821), we get a palindrome (16999961).

The spelling of 12818140 in words is "twelve million, eight hundred eighteen thousand, one hundred forty".