44138641 has 4 divisors (see below), whose sum is σ = 44760384. Its totient is φ = 43516900.

The previous prime is 44138639. The next prime is 44138671. The reversal of 44138641 is 14683144.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 44138641 - 2¹ = 44138639 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (44138671) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 310765 + ... + 310906.

It is an arithmetic number, because the mean of its divisors is an integer number (11190096).

Almost surely, 2^44138641 is an apocalyptic number.

It is an amenable number.

44138641 is a deficient number, since it is larger than the sum of its proper divisors (621743).

44138641 is an equidigital number, since it uses as much as digits as its factorization.

44138641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 621742.

The product of its digits is 9216, while the sum is 31.

The square root of 44138641 is about 6643.6918200651. The cubic root of 44138641 is about 353.4052409917.

The spelling of 44138641 in words is "forty-four million, one hundred thirty-eight thousand, six hundred forty-one".