28535585 has 8 divisors (see below), whose sum is σ = 36876840. Its totient is φ = 21072384.

The previous prime is 28535581. The next prime is 28535609. The reversal of 28535585 is 58553582.

It can be written as a sum of positive squares in 4 ways, for example, as 1868689 + 26666896 = 1367^2 + 5164^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 28535585 - 2² = 28535581 is a prime.

It is a super-2 number, since 2×28535585² = 1628559222584450, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (28535581) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 219440 + ... + 219569.

It is an arithmetic number, because the mean of its divisors is an integer number (4609605).

Almost surely, 2^28535585 is an apocalyptic number.

It is an amenable number.

28535585 is a deficient number, since it is larger than the sum of its proper divisors (8341255).

28535585 is a wasteful number, since it uses less digits than its factorization.

28535585 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 439027.

The product of its digits is 240000, while the sum is 41.

The square root of 28535585 is about 5341.8709269319. The cubic root of 28535585 is about 305.5828146602.

The spelling of 28535585 in words is "twenty-eight million, five hundred thirty-five thousand, five hundred eighty-five".