44044013 has 8 divisors (see below), whose sum is σ = 48210456. Its totient is φ = 39988800.

The previous prime is 44044009. The next prime is 44044019. The reversal of 44044013 is 31044044.

It can be written as a sum of positive squares in 4 ways, for example, as 6061444 + 37982569 = 2462^2 + 6163^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 44044013 - 2² = 44044009 is a prime.

It is a super-2 number, since 2×44044013² = 3879750162288338, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (44044019) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26978 + ... + 28563.

It is an arithmetic number, because the mean of its divisors is an integer number (6026307).

Almost surely, 2^44044013 is an apocalyptic number.

It is an amenable number.

44044013 is a deficient number, since it is larger than the sum of its proper divisors (4166443).

44044013 is a wasteful number, since it uses less digits than its factorization.

44044013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55615.

The product of its (nonzero) digits is 768, while the sum is 20.

The square root of 44044013 is about 6636.5663561815. The cubic root of 44044013 is about 353.1525073516.

Adding to 44044013 its reverse (31044044), we get a palindrome (75088057).

The spelling of 44044013 in words is "forty-four million, forty-four thousand, thirteen".