28357688853 has 24 divisors (see below), whose sum is σ = 44262566712. Its totient is φ = 17391305088.

The previous prime is 28357688833. The next prime is 28357688861. The reversal of 28357688853 is 35888675382.

28357688853 is a `hidden beast` number, since 2 + 8 + 3 + 576 + 8 + 8 + 8 + 53 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 9671345649 + 18686343204 = 98343^2 + 136698^2 .

It is not a de Polignac number, because 28357688853 - 2¹⁰ = 28357687829 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28357688833) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 379326 + ... + 447887.

It is an arithmetic number, because the mean of its divisors is an integer number (1844273613).

Almost surely, 2^28357688853 is an apocalyptic number.

It is an amenable number.

28357688853 is a deficient number, since it is larger than the sum of its proper divisors (15904877859).

28357688853 is a wasteful number, since it uses less digits than its factorization.

28357688853 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 827525 (or 827522 counting only the distinct ones).

The product of its digits is 77414400, while the sum is 63.

The spelling of 28357688853 in words is "twenty-eight billion, three hundred fifty-seven million, six hundred eighty-eight thousand, eight hundred fifty-three".