28758 has 8 divisors (see below), whose sum is σ = 57528. Its totient is φ = 9584.

The previous prime is 28753. The next prime is 28759. The reversal of 28758 is 85782.

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

28758 is an admirable number.

It is an Ulam number.

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 28758.

It is not an unprimeable number, because it can be changed into a prime (28751) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2391 + ... + 2402.

It is an arithmetic number, because the mean of its divisors is an integer number (7191).

2²⁸⁷⁵⁸ is an apocalyptic number.

28758 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

It is a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28764).

28758 is a wasteful number, since it uses less digits than its factorization.

28758 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4798.

The product of its digits is 4480, while the sum is 30.

The square root of 28758 is about 169.5818386503. The cubic root of 28758 is about 30.6374695854.

The spelling of 28758 in words is "twenty-eight thousand, seven hundred fifty-eight".