450221668 has 12 divisors (see below), whose sum is σ = 848494780. Its totient is φ = 207794592.

The previous prime is 450221647. The next prime is 450221669. The reversal of 450221668 is 866122054.

It can be written as a sum of positive squares in 2 ways, for example, as 46131264 + 404090404 = 6792^2 + 20102^2 .

It is not an unprimeable number, because it can be changed into a prime (450221669) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4329003 + ... + 4329106.

Almost surely, 2^450221668 is an apocalyptic number.

It is an amenable number.

450221668 is a deficient number, since it is larger than the sum of its proper divisors (398273112).

450221668 is a wasteful number, since it uses less digits than its factorization.

450221668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8658126 (or 8658124 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 34.

The square root of 450221668 is about 21218.4275571966. The cubic root of 450221668 is about 766.4352386121.

The spelling of 450221668 in words is "four hundred fifty million, two hundred twenty-one thousand, six hundred sixty-eight".