4444620644 has 6 divisors (see below), whose sum is σ = 7778086134. Its totient is φ = 2222310320.

The previous prime is 4444620643. The next prime is 4444620647. The reversal of 4444620644 is 4460264444.

It can be written as a sum of positive squares in only one way, i.e., 2427532900 + 2017087744 = 49270^2 + 44912^2 .

It is a junction number, because it is equal to n+sod(n) for n = 4444620598 and 4444620607.

It is not an unprimeable number, because it can be changed into a prime (4444620643) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 555577577 + ... + 555577584.

It is an arithmetic number, because the mean of its divisors is an integer number (1296347689).

Almost surely, 2^4444620644 is an apocalyptic number.

It is an amenable number.

4444620644 is a deficient number, since it is larger than the sum of its proper divisors (3333465490).

4444620644 is a wasteful number, since it uses less digits than its factorization.

4444620644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1111155165 (or 1111155163 counting only the distinct ones).

The product of its (nonzero) digits is 294912, while the sum is 38.

The square root of 4444620644 is about 66667.9881502359. The cubic root of 4444620644 is about 1644.1631098734.

The spelling of 4444620644 in words is "four billion, four hundred forty-four million, six hundred twenty thousand, six hundred forty-four".