13028656 has 40 divisors (see below), whose sum is σ = 26761680. Its totient is φ = 6134016.

The previous prime is 13028651. The next prime is 13028671. The reversal of 13028656 is 65682031.

It is not an unprimeable number, because it can be changed into a prime (13028651) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19626 + ... + 20278.

It is an arithmetic number, because the mean of its divisors is an integer number (669042).

Almost surely, 2^13028656 is an apocalyptic number.

13028656 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 13028656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13380840).

13028656 is an abundant number, since it is smaller than the sum of its proper divisors (13733024).

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

13028656 is a wasteful number, since it uses less digits than its factorization.

13028656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 733 (or 727 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 31.

The square root of 13028656 is about 3609.5229601708. The cubic root of 13028656 is about 235.3061108201.

The spelling of 13028656 in words is "thirteen million, twenty-eight thousand, six hundred fifty-six".