13328028 has 36 divisors (see below), whose sum is σ = 38503920. Its totient is φ = 3807936.

The previous prime is 13328009. The next prime is 13328033. The reversal of 13328028 is 82082331.

It is a tau number, because it is divible by the number of its divisors (36).

It is a junction number, because it is equal to n+sod(n) for n = 13327992 and 13328010.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 26193 + ... + 26696.

Almost surely, 2^13328028 is an apocalyptic number.

13328028 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

13328028 is an abundant number, since it is smaller than the sum of its proper divisors (25175892).

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

13328028 is a wasteful number, since it uses less digits than its factorization.

13328028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52906 (or 52901 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 27.

The square root of 13328028 is about 3650.7571817364. The cubic root of 13328028 is about 237.0947652860.

The spelling of 13328028 in words is "thirteen million, three hundred twenty-eight thousand, twenty-eight".