444745809 has 40 divisors (see below), whose sum is σ = 704487168. Its totient is φ = 279119520.

The previous prime is 444745801. The next prime is 444745813. The reversal of 444745809 is 908547444.

It is not a de Polignac number, because 444745809 - 2³ = 444745801 is a prime.

It is not an unprimeable number, because it can be changed into a prime (444745801) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 90514 + ... + 95300.

Almost surely, 2^444745809 is an apocalyptic number.

It is an amenable number.

444745809 is a deficient number, since it is larger than the sum of its proper divisors (259741359).

444745809 is a wasteful number, since it uses less digits than its factorization.

444745809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4867 (or 4858 counting only the distinct ones).

The product of its (nonzero) digits is 645120, while the sum is 45.

The square root of 444745809 is about 21088.9973445871. The cubic root of 444745809 is about 763.3152775467.

The spelling of 444745809 in words is "four hundred forty-four million, seven hundred forty-five thousand, eight hundred nine".