13438885850 has 36 divisors (see below), whose sum is σ = 26925043614. Its totient is φ = 4960958880.

The previous prime is 13438885819. The next prime is 13438885903. The reversal of 13438885850 is 5858883431.

It can be written as a sum of positive squares in 3 ways, for example, as 7463750449 + 5975135401 = 86393^2 + 77299^2 .

It is a junction number, because it is equal to n+sod(n) for n = 13438885792 and 13438885801.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 2953277 + ... + 2957823.

Almost surely, 2^13438885850 is an apocalyptic number.

13438885850 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

13438885850 is an abundant number, since it is smaller than the sum of its proper divisors (13486157764).

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

13438885850 is an frugal number, since it uses more digits than its factorization.

13438885850 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9119 (or 4567 counting only the distinct ones).

The product of its (nonzero) digits is 3686400, while the sum is 53.

The spelling of 13438885850 in words is "thirteen billion, four hundred thirty-eight million, eight hundred eighty-five thousand, eight hundred fifty".