28573871 has 4 divisors (see below), whose sum is σ = 28603200. Its totient is φ = 28544544.

The previous prime is 28573859. The next prime is 28573873. The reversal of 28573871 is 17837582.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 28573871 - 2⁶ = 28573807 is a prime.

It is a super-2 number, since 2×28573871² = 1632932207849282, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28573873) 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, 13151 + ... + 15168.

It is an arithmetic number, because the mean of its divisors is an integer number (7150800).

Almost surely, 2^28573871 is an apocalyptic number.

28573871 is a deficient number, since it is larger than the sum of its proper divisors (29329).

28573871 is a wasteful number, since it uses less digits than its factorization.

28573871 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29328.

The product of its digits is 94080, while the sum is 41.

The square root of 28573871 is about 5345.4533016387. The cubic root of 28573871 is about 305.7194197113.

The spelling of 28573871 in words is "twenty-eight million, five hundred seventy-three thousand, eight hundred seventy-one".