444444905 has 4 divisors (see below), whose sum is σ = 533333892. Its totient is φ = 355555920.

The previous prime is 444444901. The next prime is 444444911. The reversal of 444444905 is 509444444.

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 190743721 + 253701184 = 13811^2 + 15928^2 .

It is not a de Polignac number, because 444444905 - 2² = 444444901 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (444444901) 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 3 ways as a sum of consecutive naturals, for example, 44444486 + ... + 44444495.

It is an arithmetic number, because the mean of its divisors is an integer number (133333473).

Almost surely, 2^444444905 is an apocalyptic number.

It is an amenable number.

444444905 is a deficient number, since it is larger than the sum of its proper divisors (88888987).

444444905 is an equidigital number, since it uses as much as digits as its factorization.

444444905 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 88888986.

The product of its (nonzero) digits is 184320, while the sum is 38.

The square root of 444444905 is about 21081.8619908205. The cubic root of 444444905 is about 763.1430919710.

The spelling of 444444905 in words is "four hundred forty-four million, four hundred forty-four thousand, nine hundred five".