44391971 has 16 divisors (see below), whose sum is σ = 50318688. Its totient is φ = 38880000.

The previous prime is 44391931. The next prime is 44391979. The reversal of 44391971 is 17919344.

44391971 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 44391971 - 2¹⁴ = 44375587 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (44391979) 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 15 ways as a sum of consecutive naturals, for example, 18596 + ... + 20846.

It is an arithmetic number, because the mean of its divisors is an integer number (3144918).

Almost surely, 2^44391971 is an apocalyptic number.

44391971 is a gapful number since it is divisible by the number (41) formed by its first and last digit.

44391971 is a deficient number, since it is larger than the sum of its proper divisors (5926717).

44391971 is a wasteful number, since it uses less digits than its factorization.

44391971 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2342.

The product of its digits is 27216, while the sum is 38.

The square root of 44391971 is about 6662.7299960302. The cubic root of 44391971 is about 354.0800647741.

The spelling of 44391971 in words is "forty-four million, three hundred ninety-one thousand, nine hundred seventy-one".