4444620640 has 48 divisors (see below), whose sum is σ = 10527557040. Its totient is φ = 1773253120.

The previous prime is 4444620617. The next prime is 4444620643. The reversal of 4444620640 is 460264444.

It is a junction number, because it is equal to n+sod(n) for n = 4444620596 and 4444620605.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4444620643) 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, 26535 + ... + 97945.

It is an arithmetic number, because the mean of its divisors is an integer number (219324105).

Almost surely, 2^4444620640 is an apocalyptic number.

4444620640 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

4444620640 is an abundant number, since it is smaller than the sum of its proper divisors (6082936400).

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

4444620640 is a wasteful number, since it uses less digits than its factorization.

4444620640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71815 (or 71807 counting only the distinct ones).

The product of its (nonzero) digits is 73728, while the sum is 34.

The square root of 4444620640 is about 66667.9881202365. The cubic root of 4444620640 is about 1644.1631093802.

The spelling of 4444620640 in words is "four billion, four hundred forty-four million, six hundred twenty thousand, six hundred forty".