28568871 has 6 divisors (see below), whose sum is σ = 41266160. Its totient is φ = 19045908.

The previous prime is 28568851. The next prime is 28568879. The reversal of 28568871 is 17886582.

28568871 is a `hidden beast` number, since 2 + 8 + 568 + 87 + 1 = 666.

It is not a de Polignac number, because 28568871 - 2⁶ = 28568807 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 (28568879) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1587151 + ... + 1587168.

Almost surely, 2^28568871 is an apocalyptic number.

28568871 is a deficient number, since it is larger than the sum of its proper divisors (12697289).

28568871 is a wasteful number, since it uses less digits than its factorization.

28568871 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3174325 (or 3174322 counting only the distinct ones).

The product of its digits is 215040, while the sum is 45.

The square root of 28568871 is about 5344.9855939937. The cubic root of 28568871 is about 305.7015865627.

The spelling of 28568871 in words is "twenty-eight million, five hundred sixty-eight thousand, eight hundred seventy-one".