444025821 has 4 divisors (see below), whose sum is σ = 592034432. Its totient is φ = 296017212.

The previous prime is 444025819. The next prime is 444025823. The reversal of 444025821 is 128520444.

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 an interprime number because it is at equal distance from previous prime (444025819) and next prime (444025823).

It is not a de Polignac number, because 444025821 - 2¹ = 444025819 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (444025823) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 74004301 + ... + 74004306.

It is an arithmetic number, because the mean of its divisors is an integer number (148008608).

Almost surely, 2^444025821 is an apocalyptic number.

It is an amenable number.

444025821 is a deficient number, since it is larger than the sum of its proper divisors (148008611).

444025821 is a wasteful number, since it uses less digits than its factorization.

444025821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 148008610.

The product of its (nonzero) digits is 10240, while the sum is 30.

The square root of 444025821 is about 21071.9202020129. The cubic root of 444025821 is about 762.9031509926.

The spelling of 444025821 in words is "four hundred forty-four million, twenty-five thousand, eight hundred twenty-one".