28933 has 2 divisors, whose sum is σ = 28934. Its totient is φ = 28932.

The previous prime is 28927. The next prime is 28949. The reversal of 28933 is 33982.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 24964 + 3969 = 158^2 + 63^2 .

It is a cyclic number.

It is not a de Polignac number, because 28933 - 2⁵ = 28901 is a prime.

28933 is a lucky number.

It is a plaindrome in base 15.

It is a junction number, because it is equal to n+sod(n) for n = 28898 and 28907.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28433) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14466 + 14467.

It is an arithmetic number, because the mean of its divisors is an integer number (14467).

2²⁸⁹³³ is an apocalyptic number.

It is an amenable number.

28933 is a deficient number, since it is larger than the sum of its proper divisors (1).

28933 is an equidigital number, since it uses as much as digits as its factorization.

28933 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1296, while the sum is 25.

The square root of 28933 is about 170.0970311322. The cubic root of 28933 is about 30.6994896413.

It can be divided in two parts, 28 and 933, that added together give a square (961 = 31²).

The spelling of 28933 in words is "twenty-eight thousand, nine hundred thirty-three".