43869 has 8 divisors (see below), whose sum is σ = 66880. Its totient is φ = 25056.

The previous prime is 43867. The next prime is 43889. The reversal of 43869 is 96834.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 43869 - 2¹ = 43867 is a prime.

It is a super-2 number, since 2×43869² = 3848978322, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

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 7 ways as a sum of consecutive naturals, for example, 1024 + ... + 1065.

It is an arithmetic number, because the mean of its divisors is an integer number (8360).

2⁴³⁸⁶⁹ is an apocalyptic number.

It is an amenable number.

43869 is a deficient number, since it is larger than the sum of its proper divisors (23011).

43869 is a wasteful number, since it uses less digits than its factorization.

43869 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2099.

The product of its digits is 5184, while the sum is 30.

The square root of 43869 is about 209.4492778694. The cubic root of 43869 is about 35.2684124923.

The spelling of 43869 in words is "forty-three thousand, eight hundred sixty-nine".