13656228 has 12 divisors (see below), whose sum is σ = 31864560. Its totient is φ = 4552072.

The previous prime is 13656217. The next prime is 13656259. The reversal of 13656228 is 82265631.

It is a tau number, because it is divible by the number of its divisors (12).

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, 568998 + ... + 569021.

It is an arithmetic number, because the mean of its divisors is an integer number (2655380).

Almost surely, 2^13656228 is an apocalyptic number.

It is an amenable number.

13656228 is an abundant number, since it is smaller than the sum of its proper divisors (18208332).

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

13656228 is a wasteful number, since it uses less digits than its factorization.

13656228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1138026 (or 1138024 counting only the distinct ones).

The product of its digits is 17280, while the sum is 33.

The square root of 13656228 is about 3695.4333981280. The cubic root of 13656228 is about 239.0251428064.

The spelling of 13656228 in words is "thirteen million, six hundred fifty-six thousand, two hundred twenty-eight".