28575871 has 8 divisors (see below), whose sum is σ = 28980000. Its totient is φ = 28174848.

The previous prime is 28575863. The next prime is 28575881. The reversal of 28575871 is 17857582.

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 28575871 - 2³ = 28575863 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 (28575881) 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, 22255 + ... + 23503.

It is an arithmetic number, because the mean of its divisors is an integer number (3622500).

Almost surely, 2^28575871 is an apocalyptic number.

28575871 is a deficient number, since it is larger than the sum of its proper divisors (404129).

28575871 is a wasteful number, since it uses less digits than its factorization.

28575871 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1553.

The product of its digits is 156800, while the sum is 43.

The square root of 28575871 is about 5345.6403732387. The cubic root of 28575871 is about 305.7265523883.

The spelling of 28575871 in words is "twenty-eight million, five hundred seventy-five thousand, eight hundred seventy-one".