13439738 has 24 divisors (see below), whose sum is σ = 22238748. Its totient is φ = 6054912.

The previous prime is 13439737. The next prime is 13439743. The reversal of 13439738 is 83793431.

It can be written as a sum of positive squares in 6 ways, for example, as 4695889 + 8743849 = 2167^2 + 2957^2 .

It is not an unprimeable number, because it can be changed into a prime (13439737) 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 in 11 ways as a sum of consecutive naturals, for example, 138506 + ... + 138602.

Almost surely, 2^13439738 is an apocalyptic number.

13439738 is a deficient number, since it is larger than the sum of its proper divisors (8799010).

13439738 is an equidigital number, since it uses as much as digits as its factorization.

13439738 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 258 (or 185 counting only the distinct ones).

The product of its digits is 54432, while the sum is 38.

The square root of 13439738 is about 3666.0248226110. The cubic root of 13439738 is about 237.7553331525.

The spelling of 13439738 in words is "thirteen million, four hundred thirty-nine thousand, seven hundred thirty-eight".