13042228 has 18 divisors (see below), whose sum is σ = 23644166. Its totient is φ = 6294624.

The previous prime is 13042207. The next prime is 13042259. The reversal of 13042228 is 82224031.

It can be written as a sum of positive squares in 3 ways, for example, as 1056784 + 11985444 = 1028^2 + 3462^2 .

It is a super-2 number, since 2×13042228² = 340199422407968, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 13042199 and 13042208.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1426 + ... + 5302.

Almost surely, 2^13042228 is an apocalyptic number.

It is an amenable number.

13042228 is a deficient number, since it is larger than the sum of its proper divisors (10601938).

13042228 is a wasteful number, since it uses less digits than its factorization.

13042228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3939 (or 3908 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 22.

The square root of 13042228 is about 3611.4024976455. The cubic root of 13042228 is about 235.3877888856.

Adding to 13042228 its reverse (82224031), we get a palindrome (95266259).

The spelling of 13042228 in words is "thirteen million, forty-two thousand, two hundred twenty-eight".