13530028 has 12 divisors (see below), whose sum is σ = 25070472. Its totient is φ = 6367040.

The previous prime is 13530019. The next prime is 13530059. The reversal of 13530028 is 82003531.

It is a junction number, because it is equal to n+sod(n) for n = 13529990 and 13530008.

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, 99418 + ... + 99553.

It is an arithmetic number, because the mean of its divisors is an integer number (2089206).

Almost surely, 2^13530028 is an apocalyptic number.

It is an amenable number.

13530028 is a deficient number, since it is larger than the sum of its proper divisors (11540444).

13530028 is a wasteful number, since it uses less digits than its factorization.

13530028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 198992 (or 198990 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 22.

The square root of 13530028 is about 3678.3186376387. The cubic root of 13530028 is about 238.2865695765.

Adding to 13530028 its reverse (82003531), we get a palindrome (95533559).

The spelling of 13530028 in words is "thirteen million, five hundred thirty thousand, twenty-eight".