4407728644 has 12 divisors (see below), whose sum is σ = 8414754768. Its totient is φ = 2003513000.

The previous prime is 4407728641. The next prime is 4407728653. The reversal of 4407728644 is 4468277044.

It is a junction number, because it is equal to n+sod(n) for n = 4407728594 and 4407728603.

It is not an unprimeable number, because it can be changed into a prime (4407728641) 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, 50087782 + ... + 50087869.

It is an arithmetic number, because the mean of its divisors is an integer number (701229564).

Almost surely, 2^4407728644 is an apocalyptic number.

4407728644 is a gapful number since it is divisible by the number (44) formed by its first and last digit.

It is an amenable number.

4407728644 is a deficient number, since it is larger than the sum of its proper divisors (4007026124).

4407728644 is a wasteful number, since it uses less digits than its factorization.

4407728644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100175666 (or 100175664 counting only the distinct ones).

The product of its (nonzero) digits is 1204224, while the sum is 46.

The square root of 4407728644 is about 66390.7270934729. The cubic root of 4407728644 is about 1639.6014106690.

The spelling of 4407728644 in words is "four billion, four hundred seven million, seven hundred twenty-eight thousand, six hundred forty-four".