43640006 has 8 divisors (see below), whose sum is σ = 65684304. Its totient is φ = 21745240.

The previous prime is 43639997. The next prime is 43640011. The reversal of 43640006 is 60004634.

43640006 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 36650 + ... + 37821.

It is an arithmetic number, because the mean of its divisors is an integer number (8210538).

Almost surely, 2^43640006 is an apocalyptic number.

43640006 is a deficient number, since it is larger than the sum of its proper divisors (22044298).

43640006 is a wasteful number, since it uses less digits than its factorization.

43640006 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74766.

The product of its (nonzero) digits is 1728, while the sum is 23.

The square root of 43640006 is about 6606.0582800941. The cubic root of 43640006 is about 352.0693895143.

The spelling of 43640006 in words is "forty-three million, six hundred forty thousand, six".