444405345 has 32 divisors (see below), whose sum is σ = 755788800. Its totient is φ = 222346944.

The previous prime is 444405343. The next prime is 444405349. The reversal of 444405345 is 543504444.

It is a happy number.

It is not a de Polignac number, because 444405345 - 2¹ = 444405343 is a prime.

It is a super-2 number, since 2×444405345² = 394992221329138050, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (444405343) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 21786 + ... + 36924.

It is an arithmetic number, because the mean of its divisors is an integer number (23618400).

Almost surely, 2^444405345 is an apocalyptic number.

It is an amenable number.

444405345 is a deficient number, since it is larger than the sum of its proper divisors (311383455).

444405345 is a wasteful number, since it uses less digits than its factorization.

444405345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15269.

The product of its (nonzero) digits is 76800, while the sum is 33.

The square root of 444405345 is about 21080.9237226456. The cubic root of 444405345 is about 763.1204488671.

Adding to 444405345 its reverse (543504444), we get a palindrome (987909789).

Subtracting 444405345 from its reverse (543504444), we obtain a palindrome (99099099).

The spelling of 444405345 in words is "four hundred forty-four million, four hundred five thousand, three hundred forty-five".