13328138 has 4 divisors (see below), whose sum is σ = 19992210. Its totient is φ = 6664068.

The previous prime is 13328137. The next prime is 13328141. The reversal of 13328138 is 83182331.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 9259849 + 4068289 = 3043^2 + 2017^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 13328138.

It is not an unprimeable number, because it can be changed into a prime (13328131) by changing a digit.

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 as a sum of consecutive naturals, namely, 3332033 + ... + 3332036.

Almost surely, 2^13328138 is an apocalyptic number.

13328138 is a deficient number, since it is larger than the sum of its proper divisors (6664072).

13328138 is an equidigital number, since it uses as much as digits as its factorization.

13328138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6664071.

The product of its digits is 3456, while the sum is 29.

The square root of 13328138 is about 3650.7722470732. The cubic root of 13328138 is about 237.0954175543.

The spelling of 13328138 in words is "thirteen million, three hundred twenty-eight thousand, one hundred thirty-eight".