44040013 has 4 divisors (see below), whose sum is σ = 46630620. Its totient is φ = 41449408.

The previous prime is 44040001. The next prime is 44040077. The reversal of 44040013 is 31004044.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 25532809 + 18507204 = 5053^2 + 4302^2 .

It is a cyclic number.

It is not a de Polignac number, because 44040013 - 2⁵ = 44039981 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 (44040313) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1295278 + ... + 1295311.

It is an arithmetic number, because the mean of its divisors is an integer number (11657655).

Almost surely, 2^44040013 is an apocalyptic number.

It is an amenable number.

44040013 is a deficient number, since it is larger than the sum of its proper divisors (2590607).

44040013 is a wasteful number, since it uses less digits than its factorization.

44040013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2590606.

The product of its (nonzero) digits is 192, while the sum is 16.

The square root of 44040013 is about 6636.2649886815. The cubic root of 44040013 is about 353.1418161308.

Adding to 44040013 its reverse (31004044), we get a palindrome (75044057).

The spelling of 44040013 in words is "forty-four million, forty thousand, thirteen".