4445453440 has 128 divisors (see below), whose sum is σ = 10965326400. Its totient is φ = 1722519552.

The previous prime is 4445453407. The next prime is 4445453459. The reversal of 4445453440 is 443545444.

It is a tau number, because it is divible by the number of its divisors (128).

It is a self number, because there is not a number n which added to its sum of digits gives 4445453440.

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, 2814571 + ... + 2816149.

Almost surely, 2^4445453440 is an apocalyptic number.

4445453440 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 4445453440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5482663200).

4445453440 is an abundant number, since it is smaller than the sum of its proper divisors (6519872960).

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

4445453440 is a wasteful number, since it uses less digits than its factorization.

4445453440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1734 (or 1722 counting only the distinct ones).

The product of its (nonzero) digits is 307200, while the sum is 37.

The square root of 4445453440 is about 66674.2337038829. The cubic root of 4445453440 is about 1644.2657933238.

Adding to 4445453440 its reverse (443545444), we get a palindrome (4888998884).

The spelling of 4445453440 in words is "four billion, four hundred forty-five million, four hundred fifty-three thousand, four hundred forty".