43681384 has 8 divisors (see below), whose sum is σ = 81902610. Its totient is φ = 21840688.

The previous prime is 43681369. The next prime is 43681403. The reversal of 43681384 is 48318634.

It can be written as a sum of positive squares in only one way, i.e., 42536484 + 1144900 = 6522^2 + 1070^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 2730079 + ... + 2730094.

Almost surely, 2^43681384 is an apocalyptic number.

It is an amenable number.

43681384 is a deficient number, since it is larger than the sum of its proper divisors (38221226).

43681384 is a wasteful number, since it uses less digits than its factorization.

43681384 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5460179 (or 5460175 counting only the distinct ones).

The product of its digits is 55296, while the sum is 37.

The square root of 43681384 is about 6609.1893602771. The cubic root of 43681384 is about 352.1806278533.

The spelling of 43681384 in words is "forty-three million, six hundred eighty-one thousand, three hundred eighty-four".