4440268644 has 24 divisors (see below), whose sum is σ = 11840716608. Its totient is φ = 1268648160.

The previous prime is 4440268643. The next prime is 4440268661. The reversal of 4440268644 is 4468620444.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a junction number, because it is equal to n+sod(n) for n = 4440268596 and 4440268605.

It is not an unprimeable number, because it can be changed into a prime (4440268643) 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, 26430087 + ... + 26430254.

It is an arithmetic number, because the mean of its divisors is an integer number (493363192).

Almost surely, 2^4440268644 is an apocalyptic number.

It is an amenable number.

4440268644 is an abundant number, since it is smaller than the sum of its proper divisors (7400447964).

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

4440268644 is a wasteful number, since it uses less digits than its factorization.

4440268644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52860355 (or 52860353 counting only the distinct ones).

The product of its (nonzero) digits is 589824, while the sum is 42.

The square root of 4440268644 is about 66635.3408035106. The cubic root of 4440268644 is about 1643.6263010636.

The spelling of 4440268644 in words is "four billion, four hundred forty million, two hundred sixty-eight thousand, six hundred forty-four".