28538265845 has 16 divisors (see below), whose sum is σ = 34337882880. Its totient is φ = 22769370624.

The previous prime is 28538265793. The next prime is 28538265863. The reversal of 28538265845 is 54856283582.

It is a cyclic number.

It is not a de Polignac number, because 28538265845 - 2⁶ = 28538265781 is a prime.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4747832 + ... + 4753838.

It is an arithmetic number, because the mean of its divisors is an integer number (2146117680).

Almost surely, 2^28538265845 is an apocalyptic number.

It is an amenable number.

28538265845 is a deficient number, since it is larger than the sum of its proper divisors (5799617035).

28538265845 is a wasteful number, since it uses less digits than its factorization.

28538265845 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8404.

The product of its digits is 18432000, while the sum is 56.

The spelling of 28538265845 in words is "twenty-eight billion, five hundred thirty-eight million, two hundred sixty-five thousand, eight hundred forty-five".