444217385 has 4 divisors (see below), whose sum is σ = 533060868. Its totient is φ = 355373904.

The previous prime is 444217373. The next prime is 444217409. The reversal of 444217385 is 583712444.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 83521321 + 360696064 = 9139^2 + 18992^2 .

It is a cyclic number.

It is not a de Polignac number, because 444217385 - 2⁴ = 444217369 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 44421734 + ... + 44421743.

It is an arithmetic number, because the mean of its divisors is an integer number (133265217).

Almost surely, 2^444217385 is an apocalyptic number.

It is an amenable number.

444217385 is a deficient number, since it is larger than the sum of its proper divisors (88843483).

444217385 is an equidigital number, since it uses as much as digits as its factorization.

444217385 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88843482.

The product of its digits is 107520, while the sum is 38.

The square root of 444217385 is about 21076.4651922470. The cubic root of 444217385 is about 763.0128471413.

The spelling of 444217385 in words is "four hundred forty-four million, two hundred seventeen thousand, three hundred eighty-five".