43639946 has 16 divisors (see below), whose sum is σ = 76834176. Its totient is φ = 18197136.

The previous prime is 43639933. The next prime is 43639951. The reversal of 43639946 is 64993634.

It is a Smith number, since the sum of its digits (44) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 43639897 and 43639906.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 41606 + ... + 42641.

It is an arithmetic number, because the mean of its divisors is an integer number (4802136).

Almost surely, 2^43639946 is an apocalyptic number.

43639946 is a deficient number, since it is larger than the sum of its proper divisors (33194230).

43639946 is a wasteful number, since it uses less digits than its factorization.

43639946 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84293.

The product of its digits is 419904, while the sum is 44.

The square root of 43639946 is about 6606.0537388066. The cubic root of 43639946 is about 352.0692281625.

The spelling of 43639946 in words is "forty-three million, six hundred thirty-nine thousand, nine hundred forty-six".