28576505 has 8 divisors (see below), whose sum is σ = 34804032. Its totient is φ = 22519728.

The previous prime is 28576501. The next prime is 28576531. The reversal of 28576505 is 50567582.

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 28576505 - 2² = 28576501 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28576501) 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, 42317 + ... + 42986.

It is an arithmetic number, because the mean of its divisors is an integer number (4350504).

Almost surely, 2^28576505 is an apocalyptic number.

It is an amenable number.

28576505 is a deficient number, since it is larger than the sum of its proper divisors (6227527).

28576505 is an equidigital number, since it uses as much as digits as its factorization.

28576505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85375.

The product of its (nonzero) digits is 84000, while the sum is 38.

The square root of 28576505 is about 5345.6996735694. The cubic root of 28576505 is about 305.7288133774.

The spelling of 28576505 in words is "twenty-eight million, five hundred seventy-six thousand, five hundred five".