28013535 has 48 divisors (see below), whose sum is σ = 56103840. Its totient is φ = 12779520.

The previous prime is 28013527. The next prime is 28013539. The reversal of 28013535 is 53531082.

It is not a de Polignac number, because 28013535 - 2³ = 28013527 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 28013499 and 28013508.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28013539) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 6751 + ... + 10079.

It is an arithmetic number, because the mean of its divisors is an integer number (1168830).

Almost surely, 2^28013535 is an apocalyptic number.

28013535 is an abundant number, since it is smaller than the sum of its proper divisors (28090305).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28013535 is a wasteful number, since it uses less digits than its factorization.

28013535 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3368 (or 3365 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 27.

The square root of 28013535 is about 5292.7814048948. The cubic root of 28013535 is about 303.7078181530.

It can be divided in two parts, 2801 and 3535, that added together give a palindrome (6336).

The spelling of 28013535 in words is "twenty-eight million, thirteen thousand, five hundred thirty-five".