28518273 has 12 divisors (see below), whose sum is σ = 47077888. Its totient is φ = 16296120.

The previous prime is 28518257. The next prime is 28518283. The reversal of 28518273 is 37281582.

28518273 is nontrivially palindromic in base 12.

It is not a de Polignac number, because 28518273 - 2⁴ = 28518257 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28518283) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 226273 + ... + 226398.

Almost surely, 2^28518273 is an apocalyptic number.

It is an amenable number.

28518273 is a deficient number, since it is larger than the sum of its proper divisors (18559615).

28518273 is a wasteful number, since it uses less digits than its factorization.

28518273 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 452684 (or 452681 counting only the distinct ones).

The product of its digits is 26880, while the sum is 36.

The square root of 28518273 is about 5340.2502750339. The cubic root of 28518273 is about 305.5210050533.

The spelling of 28518273 in words is "twenty-eight million, five hundred eighteen thousand, two hundred seventy-three".