138444034 has 4 divisors (see below), whose sum is σ = 207666054. Its totient is φ = 69222016.

The previous prime is 138444017. The next prime is 138444041. The reversal of 138444034 is 430444831.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 430444831 = 1361 ⋅316271.

It can be written as a sum of positive squares in only one way, i.e., 98942809 + 39501225 = 9947^2 + 6285^2 .

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 138443987 and 138444005.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34611007 + ... + 34611010.

Almost surely, 2^138444034 is an apocalyptic number.

138444034 is a deficient number, since it is larger than the sum of its proper divisors (69222020).

138444034 is an equidigital number, since it uses as much as digits as its factorization.

138444034 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69222019.

The product of its (nonzero) digits is 18432, while the sum is 31.

The square root of 138444034 is about 11766.2242881903. The cubic root of 138444034 is about 517.3185859324.

Adding to 138444034 its reverse (430444831), we get a palindrome (568888865).

The spelling of 138444034 in words is "one hundred thirty-eight million, four hundred forty-four thousand, thirty-four".