28975 has 12 divisors (see below), whose sum is σ = 38440. Its totient is φ = 21600.

The previous prime is 28961. The next prime is 28979. The reversal of 28975 is 57982.

28975 = 3⁵ + 4⁵ + ... + 7⁵.

28975 is digitally balanced in base 6, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 28975 - 2⁹ = 28463 is a prime.

Its product of digits (5040) is a multiple of the sum of its prime factors (90).

28975 is strictly pandigital in base 6.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28979) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 445 + ... + 505.

2²⁸⁹⁷⁵ is an apocalyptic number.

28975 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

28975 is a deficient number, since it is larger than the sum of its proper divisors (9465).

28975 is a wasteful number, since it uses less digits than its factorization.

28975 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90 (or 85 counting only the distinct ones).

The product of its digits is 5040, while the sum is 31.

The square root of 28975 is about 170.2204453055. The cubic root of 28975 is about 30.7143372221.

The spelling of 28975 in words is "twenty-eight thousand, nine hundred seventy-five".