43998 has 8 divisors (see below), whose sum is σ = 88008. Its totient is φ = 14664.

The previous prime is 43997. The next prime is 44017. The reversal of 43998 is 89934.

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

43998 is an admirable number.

It is a plaindrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43991) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3661 + ... + 3672.

It is an arithmetic number, because the mean of its divisors is an integer number (11001).

2⁴³⁹⁹⁸ is an apocalyptic number.

43998 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 (44004).

43998 is a wasteful number, since it uses less digits than its factorization.

43998 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7338.

The product of its digits is 7776, while the sum is 33.

The square root of 43998 is about 209.7570022669. The cubic root of 43998 is about 35.3029484439.

The spelling of 43998 in words is "forty-three thousand, nine hundred ninety-eight".