28818585 has 24 divisors (see below), whose sum is σ = 51804480. Its totient is φ = 15369264.

The previous prime is 28818577. The next prime is 28818589. The reversal of 28818585 is 58581882.

It is not a de Polignac number, because 28818585 - 2³ = 28818577 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 28818585.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28818589) 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, 10645 + ... + 13074.

It is an arithmetic number, because the mean of its divisors is an integer number (2158520).

Almost surely, 2^28818585 is an apocalyptic number.

It is an amenable number.

28818585 is a deficient number, since it is larger than the sum of its proper divisors (22985895).

28818585 is an equidigital number, since it uses as much as digits as its factorization.

28818585 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23739 (or 23727 counting only the distinct ones).

The product of its digits is 204800, while the sum is 45.

The square root of 28818585 is about 5368.2944218811. The cubic root of 28818585 is about 306.5896933205.

It can be divided in two parts, 28818 and 585, that added together give a triangular number (29403 = T₂₄₂).

The spelling of 28818585 in words is "twenty-eight million, eight hundred eighteen thousand, five hundred eighty-five".