13040228 has 12 divisors (see below), whose sum is σ = 22876140. Its totient is φ = 6504192.

The previous prime is 13040219. The next prime is 13040231. The reversal of 13040228 is 82204031.

It can be written as a sum of positive squares in 2 ways, for example, as 2748964 + 10291264 = 1658^2 + 3208^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2033 + ... + 5496.

It is an arithmetic number, because the mean of its divisors is an integer number (1906345).

Almost surely, 2^13040228 is an apocalyptic number.

It is an amenable number.

13040228 is a deficient number, since it is larger than the sum of its proper divisors (9835912).

13040228 is a wasteful number, since it uses less digits than its factorization.

13040228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7966 (or 7964 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 20.

The square root of 13040228 is about 3611.1255862958. The cubic root of 13040228 is about 235.3757561858.

Adding to 13040228 its reverse (82204031), we get a palindrome (95244259).

The spelling of 13040228 in words is "thirteen million, forty thousand, two hundred twenty-eight".