28528587 has 12 divisors (see below), whose sum is σ = 42537664. Its totient is φ = 18405360.

The previous prime is 28528571. The next prime is 28528603. The reversal of 28528587 is 78582582.

It is an interprime number because it is at equal distance from previous prime (28528571) and next prime (28528603).

It is not a de Polignac number, because 28528587 - 2⁴ = 28528571 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28528537) 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, 50848 + ... + 51405.

Almost surely, 2^28528587 is an apocalyptic number.

28528587 is a deficient number, since it is larger than the sum of its proper divisors (14009077).

28528587 is a wasteful number, since it uses less digits than its factorization.

28528587 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102290 (or 102287 counting only the distinct ones).

The product of its digits is 358400, while the sum is 45.

The square root of 28528587 is about 5341.2158728140. The cubic root of 28528587 is about 305.5578324801.

The spelling of 28528587 in words is "twenty-eight million, five hundred twenty-eight thousand, five hundred eighty-seven".