28908 has 36 divisors (see below), whose sum is σ = 80808. Its totient is φ = 8640.

The previous prime is 28901. The next prime is 28909. The reversal of 28908 is 80982.

It is a tau number, because it is divible by the number of its divisors (36).

It is a nialpdrome in base 15.

It is not an unprimeable number, because it can be changed into a prime (28901) by changing a digit.

28908 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 360 + ... + 432.

2²⁸⁹⁰⁸ is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28908, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (40404).

28908 is an abundant number, since it is smaller than the sum of its proper divisors (51900).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28908 is a wasteful number, since it uses less digits than its factorization.

28908 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 94 (or 89 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 27.

The square root of 28908 is about 170.0235277837. The cubic root of 28908 is about 30.6906449726.

The spelling of 28908 in words is "twenty-eight thousand, nine hundred eight".