28267871 has 4 divisors (see below), whose sum is σ = 28380744. Its totient is φ = 28155000.

The previous prime is 28267867. The next prime is 28267907. The reversal of 28267871 is 17876282.

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 28267871 - 2² = 28267867 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 (28267831) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 56060 + ... + 56561.

It is an arithmetic number, because the mean of its divisors is an integer number (7095186).

Almost surely, 2^28267871 is an apocalyptic number.

28267871 is a deficient number, since it is larger than the sum of its proper divisors (112873).

28267871 is a wasteful number, since it uses less digits than its factorization.

28267871 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 112872.

The product of its digits is 75264, while the sum is 41.

The square root of 28267871 is about 5316.7538028387. The cubic root of 28267871 is about 304.6241756333.

The spelling of 28267871 in words is "twenty-eight million, two hundred sixty-seven thousand, eight hundred seventy-one".