28235382681857 has 32 divisors (see below), whose sum is σ = 31830347176992. Its totient is φ = 24871186888704.

The previous prime is 28235382681841. The next prime is 28235382681887. The reversal of 28235382681857 is 75818628353282.

It can be written as a sum of positive squares in 16 ways, for example, as 9563036717056 + 18672345964801 = 3092416^2 + 4321151^2 .

It is not a de Polignac number, because 28235382681857 - 2⁴ = 28235382681841 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28235382681887) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 68037893 + ... + 68451629.

It is an arithmetic number, because the mean of its divisors is an integer number (994698349281).

Almost surely, 2^{28235382681857} is an apocalyptic number.

It is an amenable number.

28235382681857 is a deficient number, since it is larger than the sum of its proper divisors (3594964495135).

28235382681857 is a wasteful number, since it uses less digits than its factorization.

28235382681857 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 416517.

The product of its digits is 309657600, while the sum is 68.

The spelling of 28235382681857 in words is "twenty-eight trillion, two hundred thirty-five billion, three hundred eighty-two million, six hundred eighty-one thousand, eight hundred fifty-seven".