43688634 has 16 divisors (see below), whose sum is σ = 95320800. Its totient is φ = 13238960.

The previous prime is 43688611. The next prime is 43688639.

43688634 is nontrivially palindromic in base 10.

43688634 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (43688639) 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 7 ways as a sum of consecutive naturals, for example, 330909 + ... + 331040.

It is an arithmetic number, because the mean of its divisors is an integer number (5957550).

Almost surely, 2^43688634 is an apocalyptic number.

43688634 is an abundant number, since it is smaller than the sum of its proper divisors (51632166).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

43688634 is a wasteful number, since it uses less digits than its factorization.

43688634 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 661965.

The product of its digits is 331776, while the sum is 42.

The square root of 43688634 is about 6609.7378162829. The cubic root of 43688634 is about 352.2001111211.

The spelling of 43688634 in words is "forty-three million, six hundred eighty-eight thousand, six hundred thirty-four".