13001638 has 16 divisors (see below), whose sum is σ = 21119616. Its totient is φ = 5967360.

The previous prime is 13001627. The next prime is 13001663. The reversal of 13001638 is 83610031.

13001638 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, 3723 + ... + 6313.

It is an arithmetic number, because the mean of its divisors is an integer number (1319976).

Almost surely, 2^13001638 is an apocalyptic number.

13001638 is a deficient number, since it is larger than the sum of its proper divisors (8117978).

13001638 is a wasteful number, since it uses less digits than its factorization.

13001638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2799.

The product of its (nonzero) digits is 432, while the sum is 22.

The square root of 13001638 is about 3605.7784180396. The cubic root of 13001638 is about 235.1433439630.

Adding to 13001638 its reverse (83610031), we get a palindrome (96611669).

The spelling of 13001638 in words is "thirteen million, one thousand, six hundred thirty-eight".