43864 has 8 divisors (see below), whose sum is σ = 82260. Its totient is φ = 21928.

The previous prime is 43853. The next prime is 43867. The reversal of 43864 is 46834.

43864 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

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

43864 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 as a sum of consecutive naturals, namely, 2734 + ... + 2749.

2⁴³⁸⁶⁴ is an apocalyptic number.

It is an amenable number.

43864 is a deficient number, since it is larger than the sum of its proper divisors (38396).

43864 is a wasteful number, since it uses less digits than its factorization.

43864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5489 (or 5485 counting only the distinct ones).

The product of its digits is 2304, while the sum is 25.

The square root of 43864 is about 209.4373414652. The cubic root of 43864 is about 35.2670725274.

The spelling of 43864 in words is "forty-three thousand, eight hundred sixty-four".