444045721 has 16 divisors (see below), whose sum is σ = 513458176. Its totient is φ = 376152336.

The previous prime is 444045697. The next prime is 444045731. The reversal of 444045721 is 127540444.

It is not a de Polignac number, because 444045721 - 2¹¹ = 444043673 is a prime.

It is not an unprimeable number, because it can be changed into a prime (444045731) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 272110 + ... + 273736.

It is an arithmetic number, because the mean of its divisors is an integer number (32091136).

Almost surely, 2^444045721 is an apocalyptic number.

It is an amenable number.

444045721 is a deficient number, since it is larger than the sum of its proper divisors (69412455).

444045721 is a wasteful number, since it uses less digits than its factorization.

444045721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2068.

The product of its (nonzero) digits is 17920, while the sum is 31.

The square root of 444045721 is about 21072.3923890953. The cubic root of 444045721 is about 762.9145478868.

The spelling of 444045721 in words is "four hundred forty-four million, forty-five thousand, seven hundred twenty-one".