28987585 has 16 divisors (see below), whose sum is σ = 38594880. Its totient is φ = 20722240.

The previous prime is 28987537. The next prime is 28987603. The reversal of 28987585 is 58578982.

It is a happy number.

It is not a de Polignac number, because 28987585 - 2⁷ = 28987457 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1222 + ... + 7711.

It is an arithmetic number, because the mean of its divisors is an integer number (2412180).

Almost surely, 2^28987585 is an apocalyptic number.

It is an amenable number.

28987585 is a deficient number, since it is larger than the sum of its proper divisors (9607295).

28987585 is a wasteful number, since it uses less digits than its factorization.

28987585 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9008.

The product of its digits is 1612800, while the sum is 52.

The square root of 28987585 is about 5384.0119799272. The cubic root of 28987585 is about 307.1878339965.

The spelling of 28987585 in words is "twenty-eight million, nine hundred eighty-seven thousand, five hundred eighty-five".