28518075 has 30 divisors (see below), whose sum is σ = 52829084. Its totient is φ = 15208560.

The previous prime is 28518071. The next prime is 28518079. The reversal of 28518075 is 57081582.

It is an interprime number because it is at equal distance from previous prime (28518071) and next prime (28518079).

It is not a de Polignac number, because 28518075 - 2² = 28518071 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28518071) by changing a digit.

It is a polite number, since it can be written in 29 ways as a sum of consecutive naturals, for example, 5017 + ... + 9066.

Almost surely, 2^28518075 is an apocalyptic number.

28518075 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

28518075 is a deficient number, since it is larger than the sum of its proper divisors (24311009).

28518075 is a wasteful number, since it uses less digits than its factorization.

28518075 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14105 (or 14091 counting only the distinct ones).

The product of its (nonzero) digits is 22400, while the sum is 36.

The square root of 28518075 is about 5340.2317365448. The cubic root of 28518075 is about 305.5202979827.

The spelling of 28518075 in words is "twenty-eight million, five hundred eighteen thousand, seventy-five".