28058 has 4 divisors (see below), whose sum is σ = 42090. Its totient is φ = 14028.

The previous prime is 28057. The next prime is 28069. The reversal of 28058 is 85082.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 27889 + 169 = 167^2 + 13^2 .

It is a super-3 number, since 3×28058³ = 66266096313336, which contains 333 as substring.

It is a nialpdrome in base 8 and base 14.

It is not an unprimeable number, because it can be changed into a prime (28051) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7013 + ... + 7016.

2²⁸⁰⁵⁸ is an apocalyptic number.

28058 is a deficient number, since it is larger than the sum of its proper divisors (14032).

28058 is a wasteful number, since it uses less digits than its factorization.

28058 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14031.

The product of its (nonzero) digits is 640, while the sum is 23.

The square root of 28058 is about 167.5052237991. The cubic root of 28058 is about 30.3868421821.

The spelling of 28058 in words is "twenty-eight thousand, fifty-eight".