13388938 has 4 divisors (see below), whose sum is σ = 20083410. Its totient is φ = 6694468.

The previous prime is 13388927. The next prime is 13388941. The reversal of 13388938 is 83988331.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 12229009 + 1159929 = 3497^2 + 1077^2 .

It is a junction number, because it is equal to n+sod(n) for n = 13388894 and 13388903.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3347233 + ... + 3347236.

Almost surely, 2^13388938 is an apocalyptic number.

13388938 is a deficient number, since it is larger than the sum of its proper divisors (6694472).

13388938 is an equidigital number, since it uses as much as digits as its factorization.

13388938 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6694471.

The product of its digits is 124416, while the sum is 43.

The square root of 13388938 is about 3659.0897775266. The cubic root of 13388938 is about 237.4553962405.

The spelling of 13388938 in words is "thirteen million, three hundred eighty-eight thousand, nine hundred thirty-eight".