28318129 has 12 divisors (see below), whose sum is σ = 34375104. Its totient is φ = 23216424.

The previous prime is 28318127. The next prime is 28318133. The reversal of 28318129 is 92181382.

It is not a de Polignac number, because 28318129 - 2¹ = 28318127 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 28318094 and 28318103.

It is not an unprimeable number, because it can be changed into a prime (28318127) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11437 + ... + 13690.

It is an arithmetic number, because the mean of its divisors is an integer number (2864592).

Almost surely, 2^28318129 is an apocalyptic number.

It is an amenable number.

28318129 is a deficient number, since it is larger than the sum of its proper divisors (6056975).

28318129 is a wasteful number, since it uses less digits than its factorization.

28318129 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25164 (or 25157 counting only the distinct ones).

The product of its digits is 6912, while the sum is 34.

The square root of 28318129 is about 5321.4780841417. The cubic root of 28318129 is about 304.8046011722.

The spelling of 28318129 in words is "twenty-eight million, three hundred eighteen thousand, one hundred twenty-nine".