44391481 has 4 divisors (see below), whose sum is σ = 44462464. Its totient is φ = 44320500.

The previous prime is 44391409. The next prime is 44391491. The reversal of 44391481 is 18419344.

44391481 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 44391481 - 2¹⁹ = 43867193 is a prime.

It is a super-2 number, since 2×44391481² = 3941207170746722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (44391491) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 34545 + ... + 35806.

It is an arithmetic number, because the mean of its divisors is an integer number (11115616).

Almost surely, 2^44391481 is an apocalyptic number.

It is an amenable number.

44391481 is a deficient number, since it is larger than the sum of its proper divisors (70983).

44391481 is an equidigital number, since it uses as much as digits as its factorization.

44391481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70982.

The product of its digits is 13824, while the sum is 34.

The square root of 44391481 is about 6662.6932242150. The cubic root of 44391481 is about 354.0787619869.

The spelling of 44391481 in words is "forty-four million, three hundred ninety-one thousand, four hundred eighty-one".