28518097 has 4 divisors (see below), whose sum is σ = 28812196. Its totient is φ = 28224000.

The previous prime is 28518079. The next prime is 28518103. The reversal of 28518097 is 79081582.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 79081582 = 2 ⋅39540791.

It can be written as a sum of positive squares in 2 ways, for example, as 21752896 + 6765201 = 4664^2 + 2601^2 .

It is a cyclic number.

It is not a de Polignac number, because 28518097 - 2⁷ = 28517969 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28518797) 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 in 3 ways as a sum of consecutive naturals, for example, 146904 + ... + 147097.

It is an arithmetic number, because the mean of its divisors is an integer number (7203049).

Almost surely, 2^28518097 is an apocalyptic number.

It is an amenable number.

28518097 is a deficient number, since it is larger than the sum of its proper divisors (294099).

28518097 is an equidigital number, since it uses as much as digits as its factorization.

28518097 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 294098.

The product of its (nonzero) digits is 40320, while the sum is 40.

The square root of 28518097 is about 5340.2337963801. The cubic root of 28518097 is about 305.5203765462.

The spelling of 28518097 in words is "twenty-eight million, five hundred eighteen thousand, ninety-seven".