4000644244 has 6 divisors (see below), whose sum is σ = 7001127434. Its totient is φ = 2000322120.

The previous prime is 4000644233. The next prime is 4000644253. The reversal of 4000644244 is 4424460004.

It can be written as a sum of positive squares in only one way, i.e., 3080250000 + 920394244 = 55500^2 + 30338^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 500080527 + ... + 500080534.

Almost surely, 2^4000644244 is an apocalyptic number.

It is an amenable number.

4000644244 is a deficient number, since it is larger than the sum of its proper divisors (3000483190).

4000644244 is a wasteful number, since it uses less digits than its factorization.

4000644244 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1000161065 (or 1000161063 counting only the distinct ones).

The product of its (nonzero) digits is 12288, while the sum is 28.

The square root of 4000644244 is about 63250.6461943275. The cubic root of 4000644244 is about 1587.4862701935.

The spelling of 4000644244 in words is "four billion, six hundred forty-four thousand, two hundred forty-four".