444240013 has 16 divisors (see below), whose sum is σ = 524839936. Its totient is φ = 367960320.

The previous prime is 444239993. The next prime is 444240047. The reversal of 444240013 is 310042444.

It is a de Polignac number, because none of the positive numbers 2^k-444240013 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (444250013) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 236245 + ... + 238117.

It is an arithmetic number, because the mean of its divisors is an integer number (32802496).

Almost surely, 2^444240013 is an apocalyptic number.

It is an amenable number.

444240013 is a deficient number, since it is larger than the sum of its proper divisors (80599923).

444240013 is a wasteful number, since it uses less digits than its factorization.

444240013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3004.

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

The square root of 444240013 is about 21077.0019926934. The cubic root of 444240013 is about 763.0258026312.

Adding to 444240013 its reverse (310042444), we get a palindrome (754282457).

The spelling of 444240013 in words is "four hundred forty-four million, two hundred forty thousand, thirteen".