28385 has 8 divisors (see below), whose sum is σ = 38976. Its totient is φ = 19440.

The previous prime is 28351. The next prime is 28387. The reversal of 28385 is 58382.

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

It is not a de Polignac number, because 28385 - 2¹⁰ = 27361 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28387) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 371 + ... + 440.

It is an arithmetic number, because the mean of its divisors is an integer number (4872).

2²⁸³⁸⁵ is an apocalyptic number.

It is an amenable number.

28385 is a deficient number, since it is larger than the sum of its proper divisors (10591).

28385 is an equidigital number, since it uses as much as digits as its factorization.

28385 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 823.

The product of its digits is 1920, while the sum is 26.

The square root of 28385 is about 168.4784852733. The cubic root of 28385 is about 30.5044336473.

The spelling of 28385 in words is "twenty-eight thousand, three hundred eighty-five".