43538664 has 32 divisors (see below), whose sum is σ = 117220320. Its totient is φ = 13396416.

The previous prime is 43538659. The next prime is 43538681. The reversal of 43538664 is 46683534.

It is a Harshad number since it is a multiple of its sum of digits (39).

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 in 7 ways as a sum of consecutive naturals, for example, 69462 + ... + 70085.

It is an arithmetic number, because the mean of its divisors is an integer number (3663135).

Almost surely, 2^43538664 is an apocalyptic number.

It is an amenable number.

43538664 is an abundant number, since it is smaller than the sum of its proper divisors (73681656).

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

43538664 is a wasteful number, since it uses less digits than its factorization.

43538664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 139569 (or 139565 counting only the distinct ones).

The product of its digits is 207360, while the sum is 39.

The square root of 43538664 is about 6598.3834383885. The cubic root of 43538664 is about 351.7966499373.

The spelling of 43538664 in words is "forty-three million, five hundred thirty-eight thousand, six hundred sixty-four".