13940638 has 32 divisors (see below), whose sum is σ = 22763520. Its totient is φ = 6389280.

The previous prime is 13940617. The next prime is 13940639. The reversal of 13940638 is 83604931.

It is a Smith number, since the sum of its digits (34) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13940639) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 135295 + ... + 135397.

It is an arithmetic number, because the mean of its divisors is an integer number (711360).

Almost surely, 2^13940638 is an apocalyptic number.

13940638 is a deficient number, since it is larger than the sum of its proper divisors (8822882).

13940638 is a wasteful number, since it uses less digits than its factorization.

13940638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 232.

The product of its (nonzero) digits is 15552, while the sum is 34.

The square root of 13940638 is about 3733.7163791590. The cubic root of 13940638 is about 240.6730989023.

The spelling of 13940638 in words is "thirteen million, nine hundred forty thousand, six hundred thirty-eight".