28885 has 8 divisors (see below), whose sum is σ = 35640. Its totient is φ = 22464.

The previous prime is 28879. The next prime is 28901. The reversal of 28885 is 58882.

It can be written as a sum of positive squares in 4 ways, for example, as 7569 + 21316 = 87^2 + 146^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 28885 - 2¹³ = 20693 is a prime.

It is a nialpdrome in base 14.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 211 + ... + 319.

It is an arithmetic number, because the mean of its divisors is an integer number (4455).

2²⁸⁸⁸⁵ is an apocalyptic number.

It is an amenable number.

28885 is a deficient number, since it is larger than the sum of its proper divisors (6755).

28885 is a wasteful number, since it uses less digits than its factorization.

28885 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 167.

The product of its digits is 5120, while the sum is 31.

The square root of 28885 is about 169.9558766268. The cubic root of 28885 is about 30.6825033725.

It can be divided in two parts, 288 and 85, that added together give a palindrome (373).

The spelling of 28885 in words is "twenty-eight thousand, eight hundred eighty-five".