2001100444 has 48 divisors (see below), whose sum is σ = 4218457600. Its totient is φ = 811394496.

The previous prime is 2001100433. The next prime is 2001100483. The reversal of 2001100444 is 4440011002.

It is a congruent number.

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, 486862 + ... + 490954.

Almost surely, 2^2001100444 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2001100444, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2109228800).

2001100444 is an abundant number, since it is smaller than the sum of its proper divisors (2217357156).

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

2001100444 is a wasteful number, since it uses less digits than its factorization.

2001100444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5042 (or 5040 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 16.

The square root of 2001100444 is about 44733.6611960166. The cubic root of 2001100444 is about 1260.1520862863.

Adding to 2001100444 its reverse (4440011002), we get a palindrome (6441111446).

The spelling of 2001100444 in words is "two billion, one million, one hundred thousand, four hundred forty-four".