12838391944 has 64 divisors (see below), whose sum is σ = 27812534400. Its totient is φ = 5442038784.

The previous prime is 12838391927. The next prime is 12838391957. The reversal of 12838391944 is 44919383821.

It is a junction number, because it is equal to n+sod(n) for n = 12838391891 and 12838391900.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3459562 + ... + 3463270.

It is an arithmetic number, because the mean of its divisors is an integer number (434570850).

Almost surely, 2^12838391944 is an apocalyptic number.

12838391944 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12838391944, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13906267200).

12838391944 is an abundant number, since it is smaller than the sum of its proper divisors (14974142456).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12838391944 is a wasteful number, since it uses less digits than its factorization.

12838391944 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4382 (or 4378 counting only the distinct ones).

The product of its digits is 1492992, while the sum is 52.

The spelling of 12838391944 in words is "twelve billion, eight hundred thirty-eight million, three hundred ninety-one thousand, nine hundred forty-four".