450868644 has 72 divisors (see below), whose sum is σ = 1159605720. Its totient is φ = 147689472.

The previous prime is 450868591. The next prime is 450868703. The reversal of 450868644 is 446868054.

450868644 is a `hidden beast` number, since 450 + 86 + 86 + 44 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 46376100 + 404492544 = 6810^2 + 20112^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 450868644.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 556912 + ... + 557720.

It is an arithmetic number, because the mean of its divisors is an integer number (16105635).

Almost surely, 2^450868644 is an apocalyptic number.

It is an amenable number.

450868644 is an abundant number, since it is smaller than the sum of its proper divisors (708737076).

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

450868644 is a wasteful number, since it uses less digits than its factorization.

450868644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1069 (or 1064 counting only the distinct ones).

The product of its (nonzero) digits is 737280, while the sum is 45.

The square root of 450868644 is about 21233.6677001407. The cubic root of 450868644 is about 766.8021896109.

The spelling of 450868644 in words is "four hundred fifty million, eight hundred sixty-eight thousand, six hundred forty-four".