44881639 has 4 divisors (see below), whose sum is σ = 48961800. Its totient is φ = 40801480.

The previous prime is 44881633. The next prime is 44881643. The reversal of 44881639 is 93618844.

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

It is a cyclic number.

It is not a de Polignac number, because 44881639 - 2⁹ = 44881127 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 44881595 and 44881604.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (44881633) 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, 2040064 + ... + 2040085.

It is an arithmetic number, because the mean of its divisors is an integer number (12240450).

Almost surely, 2^44881639 is an apocalyptic number.

44881639 is a deficient number, since it is larger than the sum of its proper divisors (4080161).

44881639 is a wasteful number, since it uses less digits than its factorization.

44881639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4080160.

The product of its digits is 165888, while the sum is 43.

The square root of 44881639 is about 6699.3760157197. The cubic root of 44881639 is about 355.3772066731.

The spelling of 44881639 in words is "forty-four million, eight hundred eighty-one thousand, six hundred thirty-nine".