28615 has 8 divisors (see below), whose sum is σ = 35280. Its totient is φ = 22272.

The previous prime is 28607. The next prime is 28619. The reversal of 28615 is 51682.

It is a happy number.

28615 is digitally balanced in base 6, because in such base it contains all the possibile digits an equal number of times.

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 28615 - 2³ = 28607 is a prime.

28615 is strictly pandigital in base 6.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28619) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 247 + ... + 343.

It is an arithmetic number, because the mean of its divisors is an integer number (4410).

2²⁸⁶¹⁵ is an apocalyptic number.

28615 is a deficient number, since it is larger than the sum of its proper divisors (6665).

28615 is an equidigital number, since it uses as much as digits as its factorization.

28615 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 161.

The product of its digits is 480, while the sum is 22.

The square root of 28615 is about 169.1596878692. The cubic root of 28615 is about 30.5866032747.

The spelling of 28615 in words is "twenty-eight thousand, six hundred fifteen".