28871175 has 36 divisors (see below), whose sum is σ = 49139960. Its totient is φ = 14956800.

The previous prime is 28871173. The next prime is 28871179. The reversal of 28871175 is 57117882.

It is not a de Polignac number, because 28871175 - 2¹ = 28871173 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28871173) 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 35 ways as a sum of consecutive naturals, for example, 125961 + ... + 126189.

Almost surely, 2^28871175 is an apocalyptic number.

28871175 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

28871175 is a deficient number, since it is larger than the sum of its proper divisors (20268785).

28871175 is a wasteful number, since it uses less digits than its factorization.

28871175 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 324 (or 278 counting only the distinct ones).

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

The square root of 28871175 is about 5373.1903930533. The cubic root of 28871175 is about 306.7760748302.

The spelling of 28871175 in words is "twenty-eight million, eight hundred seventy-one thousand, one hundred seventy-five".