13118638 has 8 divisors (see below), whose sum is σ = 21191688. Its totient is φ = 6054744.

The previous prime is 13118629. The next prime is 13118639. The reversal of 13118638 is 83681131.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13118639) 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, 252256 + ... + 252307.

It is an arithmetic number, because the mean of its divisors is an integer number (2648961).

Almost surely, 2^13118638 is an apocalyptic number.

13118638 is a deficient number, since it is larger than the sum of its proper divisors (8073050).

13118638 is a wasteful number, since it uses less digits than its factorization.

13118638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 504578.

The product of its digits is 3456, while the sum is 31.

The square root of 13118638 is about 3621.9660407022. The cubic root of 13118638 is about 235.8465798794.

Adding to 13118638 its reverse (83681131), we get a palindrome (96799769).

It can be divided in two parts, 131 and 18638, that added together give a square (18769 = 137²).

The spelling of 13118638 in words is "thirteen million, one hundred eighteen thousand, six hundred thirty-eight".