444666644 has 12 divisors (see below), whose sum is σ = 779100000. Its totient is φ = 222066648.

The previous prime is 444666643. The next prime is 444666653. The reversal of 444666644 is 446666444.

It is a zygodrome in base 10.

It is a junction number, because it is equal to n+sod(n) for n = 444666595 and 444666604.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (444666643) 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, 62894 + ... + 69605.

It is an arithmetic number, because the mean of its divisors is an integer number (64925000).

Almost surely, 2^444666644 is an apocalyptic number.

It is an amenable number.

444666644 is a deficient number, since it is larger than the sum of its proper divisors (334433356).

444666644 is a wasteful number, since it uses less digits than its factorization.

444666644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 133342 (or 133340 counting only the distinct ones).

The product of its digits is 1327104, while the sum is 44.

The square root of 444666644 is about 21087.1203344601. The cubic root of 444666644 is about 763.2699846787.

The spelling of 444666644 in words is "four hundred forty-four million, six hundred sixty-six thousand, six hundred forty-four".