43985 has 8 divisors (see below), whose sum is σ = 55680. Its totient is φ = 33264.

The previous prime is 43973. The next prime is 43987. The reversal of 43985 is 58934.

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

It is a cyclic number.

It is not a de Polignac number, because 43985 - 2⁴ = 43969 is a prime.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 43985.

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 in 7 ways as a sum of consecutive naturals, for example, 137 + ... + 326.

It is an arithmetic number, because the mean of its divisors is an integer number (6960).

2⁴³⁹⁸⁵ is an apocalyptic number.

It is an amenable number.

43985 is a deficient number, since it is larger than the sum of its proper divisors (11695).

43985 is a wasteful number, since it uses less digits than its factorization.

43985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 487.

The product of its digits is 4320, while the sum is 29.

The square root of 43985 is about 209.7260117391. The cubic root of 43985 is about 35.2994711378.

Subtracting from 43985 its sum of digits (29), we obtain a triangular number (43956 = T₂₉₆).

The spelling of 43985 in words is "forty-three thousand, nine hundred eighty-five".