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28422 = 2321579
BaseRepresentation
bin110111100000110
31102222200
412330012
51402142
6335330
7145602
oct67406
942880
1028422
111a399
1214546
13cc24
14a502
15864c
hex6f06

28422 has 12 divisors (see below), whose sum is σ = 61620. Its totient is φ = 9468.

The previous prime is 28411. The next prime is 28429. The reversal of 28422 is 22482.

28422 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (18), and also a Moran number because the ratio is a prime number: 1579 = 28422 / (2 + 8 + 4 + 2 + 2).

It is a junction number, because it is equal to n+sod(n) for n = 28395 and 28404.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 28422.

It is not an unprimeable number, because it can be changed into a prime (28429) by changing a digit.

28422 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 772 + ... + 807.

It is an arithmetic number, because the mean of its divisors is an integer number (5135).

228422 is an apocalyptic number.

28422 is an abundant number, since it is smaller than the sum of its proper divisors (33198).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28422 is a wasteful number, since it uses less digits than its factorization.

28422 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1587 (or 1584 counting only the distinct ones).

The product of its digits is 256, while the sum is 18.

The square root of 28422 is about 168.5882558187. The cubic root of 28422 is about 30.5176821236.

The spelling of 28422 in words is "twenty-eight thousand, four hundred twenty-two".

Divisors: 1 2 3 6 9 18 1579 3158 4737 9474 14211 28422