28875171 has 20 divisors (see below), whose sum is σ = 41832232. Its totient is φ = 17716608.

The previous prime is 28875169. The next prime is 28875227. The reversal of 28875171 is 17157882.

It is not a de Polignac number, because 28875171 - 2¹ = 28875169 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39).

Its product of digits (31360) is a multiple of the sum of its prime factors (392).

It is not an unprimeable number, because it can be changed into a prime (28875871) 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 19 ways as a sum of consecutive naturals, for example, 85515 + ... + 85851.

Almost surely, 2^28875171 is an apocalyptic number.

28875171 is a deficient number, since it is larger than the sum of its proper divisors (12957061).

28875171 is an frugal number, since it uses more digits than its factorization.

28875171 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 392 (or 353 counting only the distinct ones).

The product of its digits is 31360, while the sum is 39.

The square root of 28875171 is about 5373.5622263076. The cubic root of 28875171 is about 306.7902275926.

The spelling of 28875171 in words is "twenty-eight million, eight hundred seventy-five thousand, one hundred seventy-one".