43216978 has 16 divisors (see below), whose sum is σ = 75810240. Its totient is φ = 18090576.

The previous prime is 43216967. The next prime is 43216981. The reversal of 43216978 is 87961234.

It is a self number, because there is not a number n which added to its sum of digits gives 43216978.

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 7 ways as a sum of consecutive naturals, for example, 35293 + ... + 36496.

It is an arithmetic number, because the mean of its divisors is an integer number (4738140).

Almost surely, 2^43216978 is an apocalyptic number.

43216978 is a deficient number, since it is larger than the sum of its proper divisors (32593262).

43216978 is a wasteful number, since it uses less digits than its factorization.

43216978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71841.

The product of its digits is 72576, while the sum is 40.

The square root of 43216978 is about 6573.9621234078. The cubic root of 43216978 is about 350.9280892069.

The spelling of 43216978 in words is "forty-three million, two hundred sixteen thousand, nine hundred seventy-eight".