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BaseRepresentation
bin111000010010111
31110112112
413002113
51410243
6341235
7150014
oct70227
943475
1028823
111a723
121481b
1310172
14a70b
158818
hex7097

28823 has 8 divisors (see below), whose sum is σ = 31920. Its totient is φ = 25920.

The previous prime is 28817. The next prime is 28837. The reversal of 28823 is 32882.

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

It is a cyclic number.

It is not a de Polignac number, because 28823 - 24 = 28807 is a prime.

It is a super-3 number, since 3×288233 = 71835447233301, which contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28813) 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, 683 + ... + 723.

It is an arithmetic number, because the mean of its divisors is an integer number (3990).

228823 is an apocalyptic number.

28823 is a deficient number, since it is larger than the sum of its proper divisors (3097).

28823 is a wasteful number, since it uses less digits than its factorization.

28823 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 97.

The product of its digits is 768, while the sum is 23.

The square root of 28823 is about 169.7733783607. The cubic root of 28823 is about 30.6605349009.

It can be divided in two parts, 2882 and 3, that multiplied together give a triangular number (8646 = T131).

The spelling of 28823 in words is "twenty-eight thousand, eight hundred twenty-three".

Divisors: 1 19 37 41 703 779 1517 28823