13406638 has 16 divisors (see below), whose sum is σ = 23104224. Its totient is φ = 5715360.

The previous prime is 13406599. The next prime is 13406651. The reversal of 13406638 is 83660431.

13406638 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 328 + ... + 5188.

It is an arithmetic number, because the mean of its divisors is an integer number (1444014).

Almost surely, 2^13406638 is an apocalyptic number.

13406638 is a deficient number, since it is larger than the sum of its proper divisors (9697586).

13406638 is a wasteful number, since it uses less digits than its factorization.

13406638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5067.

The product of its (nonzero) digits is 10368, while the sum is 31.

The square root of 13406638 is about 3661.5076129922. The cubic root of 13406638 is about 237.5599878017.

The spelling of 13406638 in words is "thirteen million, four hundred six thousand, six hundred thirty-eight".