28665585 has 48 divisors (see below), whose sum is σ = 56347200. Its totient is φ = 13364352.

The previous prime is 28665577. The next prime is 28665589. The reversal of 28665585 is 58556682.

28665585 is a `hidden beast` number, since 2 + 8 + 6 + 65 + 585 = 666.

It is not a de Polignac number, because 28665585 - 2³ = 28665577 is a prime.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

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 28665585.

It is not an unprimeable number, because it can be changed into a prime (28665589) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 9826 + ... + 12404.

It is an arithmetic number, because the mean of its divisors is an integer number (1173900).

Almost surely, 2^28665585 is an apocalyptic number.

It is an amenable number.

28665585 is a deficient number, since it is larger than the sum of its proper divisors (27681615).

28665585 is a wasteful number, since it uses less digits than its factorization.

28665585 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2622 (or 2619 counting only the distinct ones).

The product of its digits is 576000, while the sum is 45.

The square root of 28665585 is about 5354.0251213456. The cubic root of 28665585 is about 306.0461611765.

It can be divided in two parts, 28665 and 585, that multiplied together give a square (16769025 = 4095²).

The spelling of 28665585 in words is "twenty-eight million, six hundred sixty-five thousand, five hundred eighty-five".