444443540 has 24 divisors (see below), whose sum is σ = 933780960. Its totient is φ = 177691808.

The previous prime is 444443537. The next prime is 444443543. The reversal of 444443540 is 45344444.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (444443537) and next prime (444443543).

It is a junction number, because it is equal to n+sod(n) for n = 444443497 and 444443506.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (444443543) 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 7 ways as a sum of consecutive naturals, for example, 52439 + ... + 60321.

It is an arithmetic number, because the mean of its divisors is an integer number (38907540).

Almost surely, 2^444443540 is an apocalyptic number.

It is an amenable number.

444443540 is an abundant number, since it is smaller than the sum of its proper divisors (489337420).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

444443540 is a wasteful number, since it uses less digits than its factorization.

444443540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10711 (or 10709 counting only the distinct ones).

The product of its (nonzero) digits is 61440, while the sum is 32.

The square root of 444443540 is about 21081.8296169948. The cubic root of 444443540 is about 763.1423107033.

Adding to 444443540 its reverse (45344444), we get a palindrome (489787984).

The spelling of 444443540 in words is "four hundred forty-four million, four hundred forty-three thousand, five hundred forty".