2857385712438 has 24 divisors (see below), whose sum is σ = 6191036295600. Its totient is φ = 952456685904.

The previous prime is 2857385712437. The next prime is 2857385712443. The reversal of 2857385712438 is 8342175837582.

It is a happy number.

2857385712438 is a `hidden beast` number, since 2 + 8 + 5 + 7 + 3 + 8 + 571 + 24 + 38 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2857385712437) 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 11 ways as a sum of consecutive naturals, for example, 4386783 + ... + 4995861.

It is an arithmetic number, because the mean of its divisors is an integer number (257959845650).

Almost surely, 2^{2857385712438} is an apocalyptic number.

2857385712438 is an abundant number, since it is smaller than the sum of its proper divisors (3333650583162).

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

2857385712438 is a wasteful number, since it uses less digits than its factorization.

2857385712438 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 869716 (or 869713 counting only the distinct ones).

The product of its digits is 90316800, while the sum is 63.

The spelling of 2857385712438 in words is "two trillion, eight hundred fifty-seven billion, three hundred eighty-five million, seven hundred twelve thousand, four hundred thirty-eight".