2444400013 has 6 divisors (see below), whose sum is σ = 2686819982. Its totient is φ = 2222181720.

The previous prime is 2444400011. The next prime is 2444400037. The reversal of 2444400013 is 3100044442.

It can be written as a sum of positive squares in only one way, i.e., 2173237924 + 271162089 = 46618^2 + 16467^2 .

It is not a de Polignac number, because 2444400013 - 2¹ = 2444400011 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2444400011) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 10100706 + ... + 10100947.

Almost surely, 2^2444400013 is an apocalyptic number.

It is an amenable number.

2444400013 is a deficient number, since it is larger than the sum of its proper divisors (242419969).

2444400013 is a wasteful number, since it uses less digits than its factorization.

2444400013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20201675 (or 20201664 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 22.

The square root of 2444400013 is about 49440.8739101566. The cubic root of 2444400013 is about 1347.0718450914.

Adding to 2444400013 its reverse (3100044442), we get a palindrome (5544444455).

The spelling of 2444400013 in words is "two billion, four hundred forty-four million, four hundred thousand, thirteen".