43406643 has 16 divisors (see below), whose sum is σ = 66256640. Its totient is φ = 24761376.

The previous prime is 43406641. The next prime is 43406653. The reversal of 43406643 is 34660434.

43406643 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 43406643 - 2¹ = 43406641 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 43406643.

It is not an unprimeable number, because it can be changed into a prime (43406641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14121 + ... + 16917.

It is an arithmetic number, because the mean of its divisors is an integer number (4141040).

Almost surely, 2^43406643 is an apocalyptic number.

43406643 is a deficient number, since it is larger than the sum of its proper divisors (22849997).

43406643 is a wasteful number, since it uses less digits than its factorization.

43406643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3546.

The product of its (nonzero) digits is 20736, while the sum is 30.

The square root of 43406643 is about 6588.3718018946. The cubic root of 43406643 is about 351.4407090744.

The spelling of 43406643 in words is "forty-three million, four hundred six thousand, six hundred forty-three".