28355 has 8 divisors (see below), whose sum is σ = 34992. Its totient is φ = 22048.

The previous prime is 28351. The next prime is 28387. The reversal of 28355 is 55382.

28355 = 15² + 16² + ... + 44².

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

It is not a de Polignac number, because 28355 - 2² = 28351 is a prime.

It is a d-powerful number, because it can be written as 2¹¹ + 8⁴ + 3⁸ + 5² + 5⁶ .

It is a Duffinian number.

It is a plaindrome in base 12.

It is a nialpdrome in base 13.

It is a self number, because there is not a number n which added to its sum of digits gives 28355.

It is not an unprimeable number, because it can be changed into a prime (28351) 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, 212 + ... + 318.

It is an arithmetic number, because the mean of its divisors is an integer number (4374).

2²⁸³⁵⁵ is an apocalyptic number.

28355 is a deficient number, since it is larger than the sum of its proper divisors (6637).

28355 is a wasteful number, since it uses less digits than its factorization.

28355 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 165.

The product of its digits is 1200, while the sum is 23.

The square root of 28355 is about 168.3894295970. The cubic root of 28355 is about 30.4936831852.

It can be divided in two parts, 28 and 355, that added together give a palindrome (383).

The spelling of 28355 in words is "twenty-eight thousand, three hundred fifty-five".