28526784871 has 16 divisors (see below), whose sum is σ = 31235500800. Its totient is φ = 25891845120.

The previous prime is 28526784833. The next prime is 28526784883. The reversal of 28526784871 is 17848762582.

It is a happy number.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28526784871 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28526784571) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3725655 + ... + 3733303.

It is an arithmetic number, because the mean of its divisors is an integer number (1952218800).

Almost surely, 2^28526784871 is an apocalyptic number.

28526784871 is a deficient number, since it is larger than the sum of its proper divisors (2708715929).

28526784871 is a wasteful number, since it uses less digits than its factorization.

28526784871 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12426.

The product of its digits is 12042240, while the sum is 58.

The spelling of 28526784871 in words is "twenty-eight billion, five hundred twenty-six million, seven hundred eighty-four thousand, eight hundred seventy-one".