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28141 = 107263
BaseRepresentation
bin110110111101101
31102121021
412313231
51400031
6334141
7145021
oct66755
942537
1028141
111a163
1214351
13ca69
14a381
158511
hex6ded

28141 has 4 divisors (see below), whose sum is σ = 28512. Its totient is φ = 27772.

The previous prime is 28123. The next prime is 28151. The reversal of 28141 is 14182.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 28141 - 25 = 28109 is a prime.

It is a Duffinian number.

28141 is a lucky number.

It is a nialpdrome in base 15.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25 + ... + 238.

It is an arithmetic number, because the mean of its divisors is an integer number (7128).

228141 is an apocalyptic number.

It is an amenable number.

28141 is a deficient number, since it is larger than the sum of its proper divisors (371).

28141 is a wasteful number, since it uses less digits than its factorization.

28141 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 370.

The product of its digits is 64, while the sum is 16.

The square root of 28141 is about 167.7527943135. The cubic root of 28141 is about 30.4167757132.

It can be divided in two parts, 28 and 141, that added together give a square (169 = 132).

The spelling of 28141 in words is "twenty-eight thousand, one hundred forty-one".

Divisors: 1 107 263 28141