28279585 has 16 divisors (see below), whose sum is σ = 36547200. Its totient is φ = 20928256.

The previous prime is 28279583. The next prime is 28279607. The reversal of 28279585 is 58597282.

It is a cyclic number.

It is not a de Polignac number, because 28279585 - 2¹ = 28279583 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28279583) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2196 + ... + 7834.

It is an arithmetic number, because the mean of its divisors is an integer number (2284200).

Almost surely, 2^28279585 is an apocalyptic number.

It is an amenable number.

28279585 is a deficient number, since it is larger than the sum of its proper divisors (8267615).

28279585 is a wasteful number, since it uses less digits than its factorization.

28279585 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5720.

The product of its digits is 403200, while the sum is 46.

The square root of 28279585 is about 5317.8553007768. The cubic root of 28279585 is about 304.6662478361. Note that the first 3 decimals are identical.

The spelling of 28279585 in words is "twenty-eight million, two hundred seventy-nine thousand, five hundred eighty-five".