4440266640 has 80 divisors (see below), whose sum is σ = 15294259200. Its totient is φ = 1184070528.

The previous prime is 4440266591. The next prime is 4440266651. The reversal of 4440266640 is 466620444.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 4440266595 and 4440266604.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1025680 + ... + 1029999.

It is an arithmetic number, because the mean of its divisors is an integer number (191178240).

Almost surely, 2^4440266640 is an apocalyptic number.

4440266640 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

4440266640 is an abundant number, since it is smaller than the sum of its proper divisors (10853992560).

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

4440266640 is a wasteful number, since it uses less digits than its factorization.

4440266640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2055701 (or 2055689 counting only the distinct ones).

The product of its (nonzero) digits is 110592, while the sum is 36.

The square root of 4440266640 is about 66635.3257664431. The cubic root of 4440266640 is about 1643.6260537942.

The spelling of 4440266640 in words is "four billion, four hundred forty million, two hundred sixty-six thousand, six hundred forty".