13218872 has 8 divisors (see below), whose sum is σ = 24785400. Its totient is φ = 6609432.

The previous prime is 13218871. The next prime is 13218893. The reversal of 13218872 is 27881231.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13218871) 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, 826172 + ... + 826187.

It is an arithmetic number, because the mean of its divisors is an integer number (3098175).

Almost surely, 2^13218872 is an apocalyptic number.

It is an amenable number.

13218872 is a deficient number, since it is larger than the sum of its proper divisors (11566528).

13218872 is a wasteful number, since it uses less digits than its factorization.

13218872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1652365 (or 1652361 counting only the distinct ones).

The product of its digits is 5376, while the sum is 32.

The square root of 13218872 is about 3635.7766708091. The cubic root of 13218872 is about 236.4457247242.

The spelling of 13218872 in words is "thirteen million, two hundred eighteen thousand, eight hundred seventy-two".