43881616 has 20 divisors (see below), whose sum is σ = 87764224. Its totient is φ = 21232800.

The previous prime is 43881599. The next prime is 43881637. The reversal of 43881616 is 61618834.

43881616 is an admirable number.

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 3 ways as a sum of consecutive naturals, for example, 43740 + ... + 44731.

Almost surely, 2^43881616 is an apocalyptic number.

It is an amenable number.

43881616 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.

43881616 is a wasteful number, since it uses less digits than its factorization.

43881616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 88510 (or 88504 counting only the distinct ones).

The product of its digits is 27648, while the sum is 37.

The square root of 43881616 is about 6624.3200405777. The cubic root of 43881616 is about 352.7179303928.

The spelling of 43881616 in words is "forty-three million, eight hundred eighty-one thousand, six hundred sixteen".