43504 has 10 divisors (see below), whose sum is σ = 84320. Its totient is φ = 21744.

The previous prime is 43499. The next prime is 43517. The reversal of 43504 is 40534.

43504 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (16), and also a Moran number because the ratio is a prime number: 2719 = 43504 / (4 + 3 + 5 + 0 + 4).

It is a congruent number.

It is an unprimeable number.

43504 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, 1344 + ... + 1375.

It is an arithmetic number, because the mean of its divisors is an integer number (8432).

2⁴³⁵⁰⁴ is an apocalyptic number.

It is an amenable number.

43504 is a deficient number, since it is larger than the sum of its proper divisors (40816).

43504 is a wasteful number, since it uses less digits than its factorization.

43504 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2727 (or 2721 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 16.

The square root of 43504 is about 208.5761251917. The cubic root of 43504 is about 35.1703262316.

Subtracting from 43504 its product of nonzero digits (240), we obtain a square (43264 = 208²).

The spelling of 43504 in words is "forty-three thousand, five hundred four".