19444039 has 12 divisors (see below), whose sum is σ = 21579696. Its totient is φ = 17426112.

The previous prime is 19444021. The next prime is 19444043. The reversal of 19444039 is 93044491.

It is not a de Polignac number, because 19444039 - 2⁷ = 19443911 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 19443995 and 19444013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19444069) by changing a digit.

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 in 11 ways as a sum of consecutive naturals, for example, 87082 + ... + 87304.

It is an arithmetic number, because the mean of its divisors is an integer number (1798308).

Almost surely, 2^19444039 is an apocalyptic number.

19444039 is a deficient number, since it is larger than the sum of its proper divisors (2135657).

19444039 is an equidigital number, since it uses as much as digits as its factorization.

19444039 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 486 (or 263 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 34.

The square root of 19444039 is about 4409.5395451226. The cubic root of 19444039 is about 268.9029053082.

The spelling of 19444039 in words is "nineteen million, four hundred forty-four thousand, thirty-nine".