43985564 has 12 divisors (see below), whose sum is σ = 87971184. Its totient is φ = 18850944.

The previous prime is 43985549. The next prime is 43985573. The reversal of 43985564 is 46558934.

43985564 is an admirable number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 785429 + ... + 785484.

It is an arithmetic number, because the mean of its divisors is an integer number (7330932).

Almost surely, 2^43985564 is an apocalyptic number.

It is an amenable number.

43985564 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

43985564 is a wasteful number, since it uses less digits than its factorization.

43985564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1570924 (or 1570922 counting only the distinct ones).

The product of its digits is 518400, while the sum is 44.

The square root of 43985564 is about 6632.1613370002. The cubic root of 43985564 is about 352.9962201362.

The spelling of 43985564 in words is "forty-three million, nine hundred eighty-five thousand, five hundred sixty-four".