43982 has 4 divisors (see below), whose sum is σ = 65976. Its totient is φ = 21990.

The previous prime is 43973. The next prime is 43987. The reversal of 43982 is 28934.

It is a semiprime because it is the product of two primes.

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 (43987) by changing a digit.

43982 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, 10994 + ... + 10997.

It is an arithmetic number, because the mean of its divisors is an integer number (16494).

2⁴³⁹⁸² is an apocalyptic number.

43982 is a deficient number, since it is larger than the sum of its proper divisors (21994).

43982 is a wasteful number, since it uses less digits than its factorization.

43982 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21993.

The product of its digits is 1728, while the sum is 26.

The square root of 43982 is about 209.7188594285. The cubic root of 43982 is about 35.2986685853.

Subtracting from 43982 its sum of digits (26), we obtain a triangular number (43956 = T₂₉₆).

The spelling of 43982 in words is "forty-three thousand, nine hundred eighty-two".