43978081 has 8 divisors (see below), whose sum is σ = 50383424. Its totient is φ = 37603440.

The previous prime is 43978079. The next prime is 43978087. The reversal of 43978081 is 18087934.

43978081 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 43978081 - 2¹ = 43978079 is a prime.

It is a super-2 number, since 2×43978081² = 3868143216885122, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (43978087) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4515 + ... + 10408.

It is an arithmetic number, because the mean of its divisors is an integer number (6297928).

Almost surely, 2^43978081 is an apocalyptic number.

It is an amenable number.

43978081 is a deficient number, since it is larger than the sum of its proper divisors (6405343).

43978081 is a wasteful number, since it uses less digits than its factorization.

43978081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15351.

The product of its (nonzero) digits is 48384, while the sum is 40.

The square root of 43978081 is about 6631.5971681036. The cubic root of 43978081 is about 352.9762012916.

The spelling of 43978081 in words is "forty-three million, nine hundred seventy-eight thousand, eighty-one".