8138448319 has 4 divisors (see below), whose sum is σ = 8146436040. Its totient is φ = 8130460600.

The previous prime is 8138448287. The next prime is 8138448323. The reversal of 8138448319 is 9138448318.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 8138448319 - 2⁵ = 8138448287 is a prime.

It is a super-2 number, since 2×8138448319² (a number of 21 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8138448349) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3992332 + ... + 3994369.

It is an arithmetic number, because the mean of its divisors is an integer number (2036609010).

Almost surely, 2^8138448319 is an apocalyptic number.

8138448319 is a deficient number, since it is larger than the sum of its proper divisors (7987721).

8138448319 is a wasteful number, since it uses less digits than its factorization.

8138448319 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7987720.

The product of its digits is 663552, while the sum is 49.

The square root of 8138448319 is about 90213.3488958258. The cubic root of 8138448319 is about 2011.4714371836.

Subtracting 8138448319 from its reverse (9138448318), we obtain a palindrome (999999999).

The spelling of 8138448319 in words is "eight billion, one hundred thirty-eight million, four hundred forty-eight thousand, three hundred nineteen".