2001443004 has 72 divisors (see below), whose sum is σ = 5709478320. Its totient is φ = 585580800.

The previous prime is 2001442999. The next prime is 2001443023. The reversal of 2001443004 is 4003441002.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

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, 75657 + ... + 98624.

It is an arithmetic number, because the mean of its divisors is an integer number (79298310).

Almost surely, 2^2001443004 is an apocalyptic number.

It is an amenable number.

2001443004 is an abundant number, since it is smaller than the sum of its proper divisors (3708035316).

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

2001443004 is a wasteful number, since it uses less digits than its factorization.

2001443004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 174331 (or 174326 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 18.

The square root of 2001443004 is about 44737.4899161766. The cubic root of 2001443004 is about 1260.2239889020.

Adding to 2001443004 its reverse (4003441002), we get a palindrome (6004884006).

The spelling of 2001443004 in words is "two billion, one million, four hundred forty-three thousand, four".