28715586 has 8 divisors (see below), whose sum is σ = 57431184. Its totient is φ = 9571860.

The previous prime is 28715581. The next prime is 28715587. The reversal of 28715586 is 68551782.

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

28715586 is an admirable number.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (28715581) by changing a digit.

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, 2392960 + ... + 2392971.

It is an arithmetic number, because the mean of its divisors is an integer number (7178898).

Almost surely, 2^28715586 is an apocalyptic number.

28715586 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28715586 is a wasteful number, since it uses less digits than its factorization.

28715586 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4785936.

The product of its digits is 134400, while the sum is 42.

The square root of 28715586 is about 5358.6925644228. The cubic root of 28715586 is about 306.2240019024.

The spelling of 28715586 in words is "twenty-eight million, seven hundred fifteen thousand, five hundred eighty-six".