30028 has 6 divisors (see below), whose sum is σ = 52556.
Its totient is φ = 15012.
The previous prime is 30013. The next prime is 30029. The reversal of 30028 is 82003.
It is not an unprimeable number, because it can be changed into a prime (30029) by changing a digit.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3750 + ... + 3757.
230028 is an apocalyptic number.
It is an amenable number.
30028 is a deficient number, since it is larger than the sum of its proper divisors (22528).
30028 is a wasteful number, since it uses less digits than its factorization.
30028 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 7511 (or 7509 counting only the distinct ones).
The product of its (nonzero) digits is 48, while the sum is 13.
The square root of 30028 is about 173.2858909433.
The cubic root of 30028 is about 31.0819889992.
The spelling of 30028 in words is "thirty thousand, twenty-eight".