13140638 has 8 divisors (see below), whose sum is σ = 22526832. Its totient is φ = 5631696.

The previous prime is 13140607. The next prime is 13140649. The reversal of 13140638 is 83604131.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 469295 + ... + 469322.

It is an arithmetic number, because the mean of its divisors is an integer number (2815854).

Almost surely, 2^13140638 is an apocalyptic number.

13140638 is a deficient number, since it is larger than the sum of its proper divisors (9386194).

13140638 is an equidigital number, since it uses as much as digits as its factorization.

13140638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 938626.

The product of its (nonzero) digits is 1728, while the sum is 26.

The square root of 13140638 is about 3625.0017931030. The cubic root of 13140638 is about 235.9783447524.

Adding to 13140638 its reverse (83604131), we get a palindrome (96744769).

The spelling of 13140638 in words is "thirteen million, one hundred forty thousand, six hundred thirty-eight".