43328661 has 8 divisors (see below), whose sum is σ = 57873984. Its totient is φ = 28834560.

The previous prime is 43328657. The next prime is 43328707. The reversal of 43328661 is 16682334.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 43328661 - 2² = 43328657 is a prime.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43328611) by changing a digit.

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, 10785 + ... + 14246.

It is an arithmetic number, because the mean of its divisors is an integer number (7234248).

Almost surely, 2^43328661 is an apocalyptic number.

It is an amenable number.

43328661 is a deficient number, since it is larger than the sum of its proper divisors (14545323).

43328661 is a wasteful number, since it uses less digits than its factorization.

43328661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25611.

The product of its digits is 20736, while the sum is 33.

The square root of 43328661 is about 6582.4509872843. The cubic root of 43328661 is about 351.2301231982.

The spelling of 43328661 in words is "forty-three million, three hundred twenty-eight thousand, six hundred sixty-one".