43984 has 10 divisors (see below), whose sum is σ = 85250. Its totient is φ = 21984.

The previous prime is 43973. The next prime is 43987. The reversal of 43984 is 48934.

43984 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 29584 + 14400 = 172^2 + 120^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43987) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1359 + ... + 1390.

It is an arithmetic number, because the mean of its divisors is an integer number (8525).

2⁴³⁹⁸⁴ is an apocalyptic number.

It is an amenable number.

43984 is a deficient number, since it is larger than the sum of its proper divisors (41266).

43984 is a wasteful number, since it uses less digits than its factorization.

43984 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2757 (or 2751 counting only the distinct ones).

The product of its digits is 3456, while the sum is 28.

The square root of 43984 is about 209.7236276627. The cubic root of 43984 is about 35.2992036244.

Subtracting from 43984 its sum of digits (28), we obtain a triangular number (43956 = T₂₉₆).

Subtracting 43984 from its reverse (48934), we obtain a triangular number (4950 = T₉₉).

The spelling of 43984 in words is "forty-three thousand, nine hundred eighty-four".