28285871 has 8 divisors (see below), whose sum is σ = 29421120. Its totient is φ = 27170208.

The previous prime is 28285867. The next prime is 28285921. The reversal of 28285871 is 17858282.

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 28285871 - 2² = 28285867 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28285801) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1916 + ... + 7761.

It is an arithmetic number, because the mean of its divisors is an integer number (3677640).

Almost surely, 2^28285871 is an apocalyptic number.

28285871 is a deficient number, since it is larger than the sum of its proper divisors (1135249).

28285871 is an equidigital number, since it uses as much as digits as its factorization.

28285871 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9793.

The product of its digits is 71680, while the sum is 41.

The square root of 28285871 is about 5318.4462956770. The cubic root of 28285871 is about 304.6888199513.

The spelling of 28285871 in words is "twenty-eight million, two hundred eighty-five thousand, eight hundred seventy-one".