13331028 has 12 divisors (see below), whose sum is σ = 31105760. Its totient is φ = 4443672.

The previous prime is 13331011. The next prime is 13331047. The reversal of 13331028 is 82013331.

It is a happy number.

13331028 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 = 13330995 and 13331013.

It is a congruent number.

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, 555448 + ... + 555471.

Almost surely, 2^13331028 is an apocalyptic number.

It is an amenable number.

13331028 is an abundant number, since it is smaller than the sum of its proper divisors (17774732).

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

13331028 is a wasteful number, since it uses less digits than its factorization.

13331028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1110926 (or 1110924 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 21.

The square root of 13331028 is about 3651.1680322877. The cubic root of 13331028 is about 237.1125531371.

Adding to 13331028 its reverse (82013331), we get a palindrome (95344359).

The spelling of 13331028 in words is "thirteen million, three hundred thirty-one thousand, twenty-eight".