43968861 has 18 divisors (see below), whose sum is σ = 64780638. Its totient is φ = 28730160.

The previous prime is 43968803. The next prime is 43968871. The reversal of 43968861 is 16886934.

It can be written as a sum of positive squares in only one way, i.e., 25948836 + 18020025 = 5094^2 + 4245^2 .

It is not a de Polignac number, because 43968861 - 2⁹ = 43968349 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43968871) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 155226 + ... + 155508.

Almost surely, 2^43968861 is an apocalyptic number.

It is an amenable number.

43968861 is a deficient number, since it is larger than the sum of its proper divisors (20811777).

43968861 is an equidigital number, since it uses as much as digits as its factorization.

43968861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 633 (or 347 counting only the distinct ones).

The product of its digits is 248832, while the sum is 45.

The square root of 43968861 is about 6630.9019748447. The cubic root of 43968861 is about 352.9515324265.

The spelling of 43968861 in words is "forty-three million, nine hundred sixty-eight thousand, eight hundred sixty-one".