28655 has 8 divisors (see below), whose sum is σ = 37584. Its totient is φ = 20800.

The previous prime is 28649. The next prime is 28657. The reversal of 28655 is 55682.

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

It is not a de Polignac number, because 28655 - 2⁶ = 28591 is a prime.

It is a super-2 number, since 2×28655² = 1642218050, which contains 22 as substring.

It is a Duffinian number.

It is a plaindrome in base 12.

It is a nialpdrome in base 15.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 28655.

It is not an unprimeable number, because it can be changed into a prime (28657) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 206 + ... + 315.

It is an arithmetic number, because the mean of its divisors is an integer number (4698).

2²⁸⁶⁵⁵ is an apocalyptic number.

28655 is a deficient number, since it is larger than the sum of its proper divisors (8929).

28655 is a wasteful number, since it uses less digits than its factorization.

28655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 537.

The product of its digits is 2400, while the sum is 26.

The square root of 28655 is about 169.2778780585. The cubic root of 28655 is about 30.6008486529.

The spelling of 28655 in words is "twenty-eight thousand, six hundred fifty-five".