2001400044 has 24 divisors (see below), whose sum is σ = 5337067008. Its totient is φ = 571828560.

The previous prime is 2001400007. The next prime is 2001400061. The reversal of 2001400044 is 4400041002.

It is a super-2 number, since 2×2001400044² = 8011204272246403872, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 2001399996 and 2001400032.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11913012 + ... + 11913179.

It is an arithmetic number, because the mean of its divisors is an integer number (222377792).

Almost surely, 2^2001400044 is an apocalyptic number.

It is an amenable number.

2001400044 is an abundant number, since it is smaller than the sum of its proper divisors (3335666964).

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

2001400044 is a wasteful number, since it uses less digits than its factorization.

2001400044 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23826205 (or 23826203 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 15.

The square root of 2001400044 is about 44737.0097793762. The cubic root of 2001400044 is about 1260.2149721393.

Adding to 2001400044 its reverse (4400041002), we get a palindrome (6401441046).

The spelling of 2001400044 in words is "two billion, one million, four hundred thousand, forty-four".