28585730 has 8 divisors (see below), whose sum is σ = 51454332. Its totient is φ = 11434288.

The previous prime is 28585717. The next prime is 28585741. The reversal of 28585730 is 3758582.

It can be written as a sum of positive squares in 2 ways, for example, as 28398241 + 187489 = 5329^2 + 433^2 .

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

It is a Curzon number.

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 3 ways as a sum of consecutive naturals, for example, 1429277 + ... + 1429296.

Almost surely, 2^28585730 is an apocalyptic number.

28585730 is a deficient number, since it is larger than the sum of its proper divisors (22868602).

28585730 is a wasteful number, since it uses less digits than its factorization.

28585730 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2858580.

The product of its (nonzero) digits is 67200, while the sum is 38.

The square root of 28585730 is about 5346.5624470308. The cubic root of 28585730 is about 305.7617080563.

The spelling of 28585730 in words is "twenty-eight million, five hundred eighty-five thousand, seven hundred thirty".