2044400004 has 18 divisors (see below), whose sum is σ = 5167788990. Its totient is φ = 681466656.

The previous prime is 2044399969. The next prime is 2044400021. The reversal of 2044400004 is 4000044402.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 1884428100 + 159971904 = 43410^2 + 12648^2 .

It is a tau number, because it is divible by the number of its divisors (18).

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

It is a self number, because there is not a number n which added to its sum of digits gives 2044400004.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 28394409 + ... + 28394480.

Almost surely, 2^2044400004 is an apocalyptic number.

It is an amenable number.

2044400004 is an abundant number, since it is smaller than the sum of its proper divisors (3123388986).

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

2044400004 is a wasteful number, since it uses less digits than its factorization.

2044400004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56788899 (or 56788894 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 18.

The square root of 2044400004 is about 45215.0417892099. The cubic root of 2044400004 is about 1269.1763117402.

Adding to 2044400004 its reverse (4000044402), we get a palindrome (6044444406).

The spelling of 2044400004 in words is "two billion, forty-four million, four hundred thousand, four".