839499994938 has 128 divisors (see below), whose sum is σ = 1945493987328. Its totient is φ = 239148000000.

The previous prime is 839499994933. The next prime is 839499994973.

839499994938 is nontrivially palindromic in base 10.

It is not an unprimeable number, because it can be changed into a prime (839499994933) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 10913913 + ... + 10990563.

It is an arithmetic number, because the mean of its divisors is an integer number (15199171776).

Almost surely, 2^839499994938 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 839499994938, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (972746993664).

839499994938 is an abundant number, since it is smaller than the sum of its proper divisors (1105993992390).

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

839499994938 is a wasteful number, since it uses less digits than its factorization.

839499994938 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76852.

The product of its digits is 4897760256, while the sum is 84.

The spelling of 839499994938 in words is "eight hundred thirty-nine billion, four hundred ninety-nine million, nine hundred ninety-four thousand, nine hundred thirty-eight".