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43668 = 22321213
BaseRepresentation
bin1010101010010100
32012220100
422222110
52344133
6534100
7241212
oct125224
965810
1043668
112a899
1221330
1316b51
1411cb2
15ce13
hexaa94

43668 has 18 divisors (see below), whose sum is σ = 110474. Its totient is φ = 14544.

The previous prime is 43661. The next prime is 43669. The reversal of 43668 is 86634.

It can be written as a sum of positive squares in only one way, i.e., 26244 + 17424 = 162^2 + 132^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a nialpdrome in base 4 and base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43661) by changing a digit.

43668 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 571 + ... + 642.

243668 is an apocalyptic number.

It is an amenable number.

43668 is an abundant number, since it is smaller than the sum of its proper divisors (66806).

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

43668 is a wasteful number, since it uses less digits than its factorization.

43668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1223 (or 1218 counting only the distinct ones).

The product of its digits is 3456, while the sum is 27.

The square root of 43668 is about 208.9688972072. The cubic root of 43668 is about 35.2144654733.

The spelling of 43668 in words is "forty-three thousand, six hundred sixty-eight".

Divisors: 1 2 3 4 6 9 12 18 36 1213 2426 3639 4852 7278 10917 14556 21834 43668