4417440644 has 24 divisors (see below), whose sum is σ = 8213456160. Its totient is φ = 2072912256.

The previous prime is 4417440623. The next prime is 4417440659. The reversal of 4417440644 is 4460447144.

It is a Harshad number since it is a multiple of its sum of digits (38).

It is a junction number, because it is equal to n+sod(n) for n = 4417440598 and 4417440607.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 263477 + ... + 279740.

It is an arithmetic number, because the mean of its divisors is an integer number (342227340).

Almost surely, 2^4417440644 is an apocalyptic number.

It is an amenable number.

4417440644 is a deficient number, since it is larger than the sum of its proper divisors (3796015516).

4417440644 is a wasteful number, since it uses less digits than its factorization.

4417440644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 543347 (or 543345 counting only the distinct ones).

The product of its (nonzero) digits is 172032, while the sum is 38.

The square root of 4417440644 is about 66463.8295917411. The cubic root of 4417440644 is about 1640.8047611897.

Adding to 4417440644 its reverse (4460447144), we get a palindrome (8877887788).

The spelling of 4417440644 in words is "four billion, four hundred seventeen million, four hundred forty thousand, six hundred forty-four".