447694664 has 8 divisors (see below), whose sum is σ = 839427510. Its totient is φ = 223847328.

The previous prime is 447694651. The next prime is 447694669. The reversal of 447694664 is 466496744.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 271920100 + 175774564 = 16490^2 + 13258^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (447694669) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27980909 + ... + 27980924.

Almost surely, 2^447694664 is an apocalyptic number.

It is an amenable number.

447694664 is a deficient number, since it is larger than the sum of its proper divisors (391732846).

447694664 is a wasteful number, since it uses less digits than its factorization.

447694664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55961839 (or 55961835 counting only the distinct ones).

The product of its digits is 3483648, while the sum is 50.

The square root of 447694664 is about 21158.7963740852. The cubic root of 447694664 is about 764.9985982574.

The spelling of 447694664 in words is "four hundred forty-seven million, six hundred ninety-four thousand, six hundred sixty-four".