28858 has 8 divisors (see below), whose sum is σ = 44352. Its totient is φ = 14076.

The previous prime is 28843. The next prime is 28859. The reversal of 28858 is 85882.

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

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (28859) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 60 + ... + 247.

It is an arithmetic number, because the mean of its divisors is an integer number (5544).

2²⁸⁸⁵⁸ is an apocalyptic number.

28858 is a deficient number, since it is larger than the sum of its proper divisors (15494).

28858 is a wasteful number, since it uses less digits than its factorization.

28858 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 356.

The product of its digits is 5120, while the sum is 31.

The square root of 28858 is about 169.8764256747. The cubic root of 28858 is about 30.6729403254.

The spelling of 28858 in words is "twenty-eight thousand, eight hundred fifty-eight".