28521884011 has 4 divisors (see below), whose sum is σ = 30199641912. Its totient is φ = 26844126112.

The previous prime is 28521883939. The next prime is 28521884063. The reversal of 28521884011 is 11048812582.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 28521884011 - 2¹¹ = 28521881963 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28521884071) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 838878925 + ... + 838878958.

It is an arithmetic number, because the mean of its divisors is an integer number (7549910478).

Almost surely, 2^28521884011 is an apocalyptic number.

28521884011 is a deficient number, since it is larger than the sum of its proper divisors (1677757901).

28521884011 is a wasteful number, since it uses less digits than its factorization.

28521884011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1677757900.

The product of its (nonzero) digits is 40960, while the sum is 40.

The spelling of 28521884011 in words is "twenty-eight billion, five hundred twenty-one million, eight hundred eighty-four thousand, eleven".