28787585 has 8 divisors (see below), whose sum is σ = 34589376. Its totient is φ = 23000560.

The previous prime is 28787569. The next prime is 28787587. The reversal of 28787585 is 58578782.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 28787585 - 2⁴ = 28787569 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28787587) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1190 + ... + 7680.

It is an arithmetic number, because the mean of its divisors is an integer number (4323672).

Almost surely, 2^28787585 is an apocalyptic number.

It is an amenable number.

28787585 is a deficient number, since it is larger than the sum of its proper divisors (5801791).

28787585 is an equidigital number, since it uses as much as digits as its factorization.

28787585 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7383.

The product of its digits is 1254400, while the sum is 50.

The square root of 28787585 is about 5365.4063219853. The cubic root of 28787585 is about 306.4797215733.

The spelling of 28787585 in words is "twenty-eight million, seven hundred eighty-seven thousand, five hundred eighty-five".