444883721 has 8 divisors (see below), whose sum is σ = 449497224. Its totient is φ = 440294400.

The previous prime is 444883711. The next prime is 444883723. The reversal of 444883721 is 127388444.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 197262025 + 247621696 = 14045^2 + 15736^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 444883721 - 2¹⁸ = 444621577 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (444883723) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 32171 + ... + 43871.

It is an arithmetic number, because the mean of its divisors is an integer number (56187153).

Almost surely, 2^444883721 is an apocalyptic number.

It is an amenable number.

444883721 is a deficient number, since it is larger than the sum of its proper divisors (4613503).

444883721 is a wasteful number, since it uses less digits than its factorization.

444883721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12091.

The product of its digits is 172032, while the sum is 41.

The square root of 444883721 is about 21092.2668530436. The cubic root of 444883721 is about 763.3941686459.

The spelling of 444883721 in words is "four hundred forty-four million, eight hundred eighty-three thousand, seven hundred twenty-one".