28930 has 16 divisors (see below), whose sum is σ = 57024. Its totient is φ = 10480.

The previous prime is 28927. The next prime is 28933. The reversal of 28930 is 3982.

It is an interprime number because it is at equal distance from previous prime (28927) and next prime (28933).

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a plaindrome in base 12 and base 15.

It is not an unprimeable number, because it can be changed into a prime (28933) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22 + ... + 241.

It is an arithmetic number, because the mean of its divisors is an integer number (3564).

2²⁸⁹³⁰ is an apocalyptic number.

28930 is a deficient number, since it is larger than the sum of its proper divisors (28094).

28930 is a wasteful number, since it uses less digits than its factorization.

28930 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 281.

The product of its (nonzero) digits is 432, while the sum is 22.

The square root of 28930 is about 170.0882124076. The cubic root of 28930 is about 30.6984285501.

The spelling of 28930 in words is "twenty-eight thousand, nine hundred thirty".