440644648 has 8 divisors (see below), whose sum is σ = 826208730. Its totient is φ = 220322320.

The previous prime is 440644643. The next prime is 440644723. The reversal of 440644648 is 846446044.

It can be written as a sum of positive squares in only one way, i.e., 385022884 + 55621764 = 19622^2 + 7458^2 .

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

It is a super-2 number, since 2×440644648² = 388335411622087808, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 440644648.

It is not an unprimeable number, because it can be changed into a prime (440644643) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27540283 + ... + 27540298.

Almost surely, 2^440644648 is an apocalyptic number.

It is an amenable number.

440644648 is a deficient number, since it is larger than the sum of its proper divisors (385564082).

440644648 is a wasteful number, since it uses less digits than its factorization.

440644648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55080587 (or 55080583 counting only the distinct ones).

The product of its (nonzero) digits is 294912, while the sum is 40.

The square root of 440644648 is about 20991.5375330155. The cubic root of 440644648 is about 760.9617602434.

The spelling of 440644648 in words is "four hundred forty million, six hundred forty-four thousand, six hundred forty-eight".