838843749172 has 48 divisors (see below), whose sum is σ = 1725377234112. Its totient is φ = 351807022080.

The previous prime is 838843749113. The next prime is 838843749173. The reversal of 838843749172 is 271947348838.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (838843749173) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 977563 + ... + 1622749.

It is an arithmetic number, because the mean of its divisors is an integer number (35945359044).

Almost surely, 2^838843749172 is an apocalyptic number.

It is an amenable number.

838843749172 is an abundant number, since it is smaller than the sum of its proper divisors (886533484940).

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

838843749172 is a wasteful number, since it uses less digits than its factorization.

838843749172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 647488 (or 647486 counting only the distinct ones).

The product of its digits is 65028096, while the sum is 64.

The spelling of 838843749172 in words is "eight hundred thirty-eight billion, eight hundred forty-three million, seven hundred forty-nine thousand, one hundred seventy-two".