13028856 has 32 divisors (see below), whose sum is σ = 33989760. Its totient is φ = 4153952.

The previous prime is 13028843. The next prime is 13028863. The reversal of 13028856 is 65882031.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11250 + ... + 12353.

It is an arithmetic number, because the mean of its divisors is an integer number (1062180).

Almost surely, 2^13028856 is an apocalyptic number.

It is an amenable number.

13028856 is an abundant number, since it is smaller than the sum of its proper divisors (20960904).

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

13028856 is a wasteful number, since it uses less digits than its factorization.

13028856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23635 (or 23631 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 33.

The square root of 13028856 is about 3609.5506645565. The cubic root of 13028856 is about 235.3073148578.

The spelling of 13028856 in words is "thirteen million, twenty-eight thousand, eight hundred fifty-six".