28516089 has 24 divisors (see below), whose sum is σ = 46834848. Its totient is φ = 15335040.

The previous prime is 28516087. The next prime is 28516091. The reversal of 28516089 is 98061582.

It is an interprime number because it is at equal distance from previous prime (28516087) and next prime (28516091).

It is not a de Polignac number, because 28516089 - 2¹ = 28516087 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28516087) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3207 + ... + 8204.

It is an arithmetic number, because the mean of its divisors is an integer number (1951452).

Almost surely, 2^28516089 is an apocalyptic number.

It is an amenable number.

28516089 is a deficient number, since it is larger than the sum of its proper divisors (18318759).

28516089 is a wasteful number, since it uses less digits than its factorization.

28516089 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11445 (or 11438 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 39.

The square root of 28516089 is about 5340.0457863206. The cubic root of 28516089 is about 305.5132056690.

The spelling of 28516089 in words is "twenty-eight million, five hundred sixteen thousand, eighty-nine".