13839442 has 4 divisors (see below), whose sum is σ = 20759166. Its totient is φ = 6919720.

The previous prime is 13839439. The next prime is 13839461. The reversal of 13839442 is 24493831.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 24493831 = 19 ⋅1289149.

It can be written as a sum of positive squares in only one way, i.e., 8590761 + 5248681 = 2931^2 + 2291^2 .

It is a junction number, because it is equal to n+sod(n) for n = 13839398 and 13839407.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 3459859 + ... + 3459862.

Almost surely, 2^13839442 is an apocalyptic number.

13839442 is a deficient number, since it is larger than the sum of its proper divisors (6919724).

13839442 is an equidigital number, since it uses as much as digits as its factorization.

13839442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6919723.

The product of its digits is 20736, while the sum is 34.

The square root of 13839442 is about 3720.1400511271. The cubic root of 13839442 is about 240.0893301723.

The spelling of 13839442 in words is "thirteen million, eight hundred thirty-nine thousand, four hundred forty-two".