13188938 has 12 divisors (see below), whose sum is σ = 23013522. Its totient is φ = 5652360.

The previous prime is 13188893. The next prime is 13188941. The reversal of 13188938 is 83988131.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 7491169 + 5697769 = 2737^2 + 2387^2 .

It is a junction number, because it is equal to n+sod(n) for n = 13188895 and 13188904.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 67193 + ... + 67388.

Almost surely, 2^13188938 is an apocalyptic number.

13188938 is a deficient number, since it is larger than the sum of its proper divisors (9824584).

13188938 is a wasteful number, since it uses less digits than its factorization.

13188938 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 134597 (or 134590 counting only the distinct ones).

The product of its digits is 41472, while the sum is 41.

The square root of 13188938 is about 3631.6577481916. The cubic root of 13188938 is about 236.2671135294.

The spelling of 13188938 in words is "thirteen million, one hundred eighty-eight thousand, nine hundred thirty-eight".