2001443600 has 120 divisors (see below), whose sum is σ = 5299369152. Its totient is φ = 721728000.

The previous prime is 2001443581. The next prime is 2001443623. The reversal of 2001443600 is 63441002.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 219125 + ... + 228075.

Almost surely, 2^2001443600 is an apocalyptic number.

2001443600 is a gapful number since it is divisible by the number (20) 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 2001443600, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2649684576).

2001443600 is an abundant number, since it is smaller than the sum of its proper divisors (3297925552).

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

2001443600 is a wasteful number, since it uses less digits than its factorization.

2001443600 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9025 (or 9014 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 20.

The square root of 2001443600 is about 44737.4965772561. The cubic root of 2001443600 is about 1260.2241139939.

Adding to 2001443600 its reverse (63441002), we get a palindrome (2064884602).

The spelling of 2001443600 in words is "two billion, one million, four hundred forty-three thousand, six hundred".