4400644240 has 40 divisors (see below), whose sum is σ = 10234791360. Its totient is φ = 1759691136.

The previous prime is 4400644231. The next prime is 4400644243. The reversal of 4400644240 is 424460044.

It is a tau number, because it is divible by the number of its divisors (40).

It is a junction number, because it is equal to n+sod(n) for n = 4400644199 and 4400644208.

It is not an unprimeable number, because it can be changed into a prime (4400644243) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 314677 + ... + 328363.

It is an arithmetic number, because the mean of its divisors is an integer number (255869784).

Almost surely, 2^4400644240 is an apocalyptic number.

4400644240 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

4400644240 is an abundant number, since it is smaller than the sum of its proper divisors (5834147120).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

4400644240 is a wasteful number, since it uses less digits than its factorization.

4400644240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17719 (or 17713 counting only the distinct ones).

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

The square root of 4400644240 is about 66337.3517710799. The cubic root of 4400644240 is about 1638.7225129855.

The spelling of 4400644240 in words is "four billion, four hundred million, six hundred forty-four thousand, two hundred forty".