43842 has 8 divisors (see below), whose sum is σ = 87696. Its totient is φ = 14612.

The previous prime is 43801. The next prime is 43853. The reversal of 43842 is 24834.

It is a happy number.

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

43842 is an admirable number.

It is an unprimeable number.

43842 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 3 ways as a sum of consecutive naturals, for example, 3648 + ... + 3659.

It is an arithmetic number, because the mean of its divisors is an integer number (10962).

2⁴³⁸⁴² is an apocalyptic number.

43842 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

It is a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (43848).

43842 is a wasteful number, since it uses less digits than its factorization.

43842 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7312.

The product of its digits is 768, while the sum is 21.

The square root of 43842 is about 209.3848132029. The cubic root of 43842 is about 35.2611754718.

The spelling of 43842 in words is "forty-three thousand, eight hundred forty-two".