28958 has 4 divisors (see below), whose sum is σ = 43440. Its totient is φ = 14478.

The previous prime is 28949. The next prime is 28961. The reversal of 28958 is 85982.

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

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

28958 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7238 + ... + 7241.

It is an arithmetic number, because the mean of its divisors is an integer number (10860).

2²⁸⁹⁵⁸ is an apocalyptic number.

28958 is a deficient number, since it is larger than the sum of its proper divisors (14482).

28958 is a wasteful number, since it uses less digits than its factorization.

28958 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14481.

The product of its digits is 5760, while the sum is 32.

The square root of 28958 is about 170.1705027318. The cubic root of 28958 is about 30.7083292165.

The spelling of 28958 in words is "twenty-eight thousand, nine hundred fifty-eight".