13505028 has 12 divisors (see below), whose sum is σ = 31511760. Its totient is φ = 4501672.

The previous prime is 13504999. The next prime is 13505033. The reversal of 13505028 is 82050531.

It is a tau number, because it is divible by the number of its divisors (12).

It is a junction number, because it is equal to n+sod(n) for n = 13504989 and 13505007.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 562698 + ... + 562721.

It is an arithmetic number, because the mean of its divisors is an integer number (2625980).

Almost surely, 2^13505028 is an apocalyptic number.

It is an amenable number.

13505028 is an abundant number, since it is smaller than the sum of its proper divisors (18006732).

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

13505028 is a wasteful number, since it uses less digits than its factorization.

13505028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1125426 (or 1125424 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 24.

The square root of 13505028 is about 3674.9187746126. The cubic root of 13505028 is about 238.1397150612.

Adding to 13505028 its reverse (82050531), we get a palindrome (95555559).

The spelling of 13505028 in words is "thirteen million, five hundred five thousand, twenty-eight".