443421864 has 40 divisors (see below), whose sum is σ = 1241993610. Its totient is φ = 147807072.

The previous prime is 443421841. The next prime is 443421911. The reversal of 443421864 is 468124344.

443421864 is a `hidden beast` number, since 4 + 434 + 218 + 6 + 4 = 666.

It can be written as a sum of positive squares in only one way, i.e., 442765764 + 656100 = 21042^2 + 810^2 .

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

It is a nude number because it is divisible by every one of its digits.

It is an unprimeable number.

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 9 ways as a sum of consecutive naturals, for example, 341499 + ... + 342794.

Almost surely, 2^443421864 is an apocalyptic number.

It is an amenable number.

443421864 is an abundant number, since it is smaller than the sum of its proper divisors (798571746).

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

443421864 is a wasteful number, since it uses less digits than its factorization.

443421864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 684311 (or 684298 counting only the distinct ones).

The product of its digits is 73728, while the sum is 36.

The square root of 443421864 is about 21057.5844768577. The cubic root of 443421864 is about 762.5570977220.

The spelling of 443421864 in words is "four hundred forty-three million, four hundred twenty-one thousand, eight hundred sixty-four".