13056228 has 60 divisors (see below), whose sum is σ = 34760880. Its totient is φ = 4272048.

The previous prime is 13056209. The next prime is 13056229. The reversal of 13056228 is 82265031.

13056228 is a `hidden beast` number, since 1 + 30 + 5 + 622 + 8 = 666.

13056228 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (13056229) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 18775 + ... + 19457.

It is an arithmetic number, because the mean of its divisors is an integer number (579348).

Almost surely, 2^13056228 is an apocalyptic number.

13056228 is a gapful number since it is divisible by the number (18) 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 13056228, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17380440).

13056228 is an abundant number, since it is smaller than the sum of its proper divisors (21704652).

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

13056228 is a wasteful number, since it uses less digits than its factorization.

13056228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 758 (or 747 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 27.

The square root of 13056228 is about 3613.3402828961. The cubic root of 13056228 is about 235.4719833603.

The spelling of 13056228 in words is "thirteen million, fifty-six thousand, two hundred twenty-eight".