13422638 has 8 divisors (see below), whose sum is σ = 20678232. Its totient is φ = 6529896.

The previous prime is 13422637. The next prime is 13422641. The reversal of 13422638 is 83622431.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 13422638.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13422631) 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 in 3 ways as a sum of consecutive naturals, for example, 90620 + ... + 90767.

It is an arithmetic number, because the mean of its divisors is an integer number (2584779).

Almost surely, 2^13422638 is an apocalyptic number.

13422638 is a deficient number, since it is larger than the sum of its proper divisors (7255594).

13422638 is a wasteful number, since it uses less digits than its factorization.

13422638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 181426.

The product of its digits is 6912, while the sum is 29.

The square root of 13422638 is about 3663.6918538545. The cubic root of 13422638 is about 237.6544546555.

The spelling of 13422638 in words is "thirteen million, four hundred twenty-two thousand, six hundred thirty-eight".