13257228 has 12 divisors (see below), whose sum is σ = 30933560. Its totient is φ = 4419072.

The previous prime is 13257221. The next prime is 13257253. The reversal of 13257228 is 82275231.

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

It is a junction number, because it is equal to n+sod(n) for n = 13257195 and 13257204.

It is not an unprimeable number, because it can be changed into a prime (13257221) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 552373 + ... + 552396.

Almost surely, 2^13257228 is an apocalyptic number.

It is an amenable number.

13257228 is an abundant number, since it is smaller than the sum of its proper divisors (17676332).

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

13257228 is a wasteful number, since it uses less digits than its factorization.

13257228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1104776 (or 1104774 counting only the distinct ones).

The product of its digits is 6720, while the sum is 30.

The square root of 13257228 is about 3641.0476514322. The cubic root of 13257228 is about 236.6741949158.

The spelling of 13257228 in words is "thirteen million, two hundred fifty-seven thousand, two hundred twenty-eight".