43866 has 12 divisors (see below), whose sum is σ = 95082. Its totient is φ = 14616.

The previous prime is 43853. The next prime is 43867. The reversal of 43866 is 66834.

It can be written as a sum of positive squares in only one way, i.e., 27225 + 16641 = 165^2 + 129^2 .

It is not an unprimeable number, because it can be changed into a prime (43867) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1201 + ... + 1236.

2⁴³⁸⁶⁶ is an apocalyptic number.

43866 is an abundant number, since it is smaller than the sum of its proper divisors (51216).

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

43866 is a wasteful number, since it uses less digits than its factorization.

43866 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2445 (or 2442 counting only the distinct ones).

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

The square root of 43866 is about 209.4421161085. The cubic root of 43866 is about 35.2676085256.

It can be divided in two parts, 43 and 866, that added together give a palindrome (909).

The spelling of 43866 in words is "forty-three thousand, eight hundred sixty-six".