28923 has 8 divisors (see below), whose sum is σ = 39936. Its totient is φ = 18600.

The previous prime is 28921. The next prime is 28927. The reversal of 28923 is 32982.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 28923 - 2¹ = 28921 is a prime.

28923 is a lucky number.

It is a nialpdrome in base 15.

It is a junction number, because it is equal to n+sod(n) for n = 28893 and 28902.

It is not an unprimeable number, because it can be changed into a prime (28921) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 63 + ... + 248.

It is an arithmetic number, because the mean of its divisors is an integer number (4992).

2²⁸⁹²³ is an apocalyptic number.

28923 is a deficient number, since it is larger than the sum of its proper divisors (11013).

28923 is a wasteful number, since it uses less digits than its factorization.

28923 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 345.

The product of its digits is 864, while the sum is 24.

The square root of 28923 is about 170.0676336050. The cubic root of 28923 is about 30.6959523854.

The spelling of 28923 in words is "twenty-eight thousand, nine hundred twenty-three".