443686668 has 24 divisors (see below), whose sum is σ = 1049852160. Its totient is φ = 145812240.

The previous prime is 443686657. The next prime is 443686679. The reversal of 443686668 is 866686344.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (443686657) and next prime (443686679).

It is a self number, because there is not a number n which added to its sum of digits gives 443686668.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 259528 + ... + 261231.

It is an arithmetic number, because the mean of its divisors is an integer number (43743840).

Almost surely, 2^443686668 is an apocalyptic number.

It is an amenable number.

443686668 is an abundant number, since it is smaller than the sum of its proper divisors (606165492).

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

443686668 is a wasteful number, since it uses less digits than its factorization.

443686668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 520837 (or 520835 counting only the distinct ones).

The product of its digits is 3981312, while the sum is 51.

The square root of 443686668 is about 21063.8711541825. The cubic root of 443686668 is about 762.7088628944.

The spelling of 443686668 in words is "four hundred forty-three million, six hundred eighty-six thousand, six hundred sixty-eight".