43216668 has 36 divisors (see below), whose sum is σ = 119174328. Its totient is φ = 13095840.

The previous prime is 43216661. The next prime is 43216687. The reversal of 43216668 is 86661234.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43216661) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 54171 + ... + 54962.

It is an arithmetic number, because the mean of its divisors is an integer number (3310398).

Almost surely, 2^43216668 is an apocalyptic number.

It is an amenable number.

43216668 is an abundant number, since it is smaller than the sum of its proper divisors (75957660).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

43216668 is a wasteful number, since it uses less digits than its factorization.

43216668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 109154 (or 109149 counting only the distinct ones).

The product of its digits is 41472, while the sum is 36.

The square root of 43216668 is about 6573.9385454992. The cubic root of 43216668 is about 350.9272501233.

It can be divided in two parts, 432166 and 68, that added together give a palindrome (432234).

The spelling of 43216668 in words is "forty-three million, two hundred sixteen thousand, six hundred sixty-eight".