13889738 has 4 divisors (see below), whose sum is σ = 20834610. Its totient is φ = 6944868.

The previous prime is 13889737. The next prime is 13889747. The reversal of 13889738 is 83798831.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 83798831 = 17 ⋅4929343.

It can be written as a sum of positive squares in only one way, i.e., 11242609 + 2647129 = 3353^2 + 1627^2 .

It is a junction number, because it is equal to n+sod(n) for n = 13889692 and 13889701.

It is not an unprimeable number, because it can be changed into a prime (13889737) by changing a digit.

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 as a sum of consecutive naturals, namely, 3472433 + ... + 3472436.

Almost surely, 2^13889738 is an apocalyptic number.

13889738 is a deficient number, since it is larger than the sum of its proper divisors (6944872).

13889738 is an equidigital number, since it uses as much as digits as its factorization.

13889738 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6944871.

The product of its digits is 290304, while the sum is 47.

The square root of 13889738 is about 3726.8938809684. The cubic root of 13889738 is about 240.3798268053.

The spelling of 13889738 in words is "thirteen million, eight hundred eighty-nine thousand, seven hundred thirty-eight".