28520880535 has 16 divisors (see below), whose sum is σ = 41415195456. Its totient is φ = 18406752768.

The previous prime is 28520880517. The next prime is 28520880539. The reversal of 28520880535 is 53508802582.

It is a cyclic number.

It is not a de Polignac number, because 28520880535 - 2⁹ = 28520880023 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28520880539) 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, 23966532 + ... + 23967721.

It is an arithmetic number, because the mean of its divisors is an integer number (2588449716).

Almost surely, 2^28520880535 is an apocalyptic number.

28520880535 is a deficient number, since it is larger than the sum of its proper divisors (12894314921).

28520880535 is a wasteful number, since it uses less digits than its factorization.

28520880535 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47934282.

The product of its (nonzero) digits is 768000, while the sum is 46.

The spelling of 28520880535 in words is "twenty-eight billion, five hundred twenty million, eight hundred eighty thousand, five hundred thirty-five".