444444444040 has 128 divisors (see below), whose sum is σ = 1054781118720. Its totient is φ = 168209536000.

The previous prime is 444444444023. The next prime is 444444444071. The reversal of 444444444040 is 40444444444.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a junction number, because it is equal to n+sod(n) for n = 444444443984 and 444444444002.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 179427282 + ... + 179429758.

It is an arithmetic number, because the mean of its divisors is an integer number (8240477490).

Almost surely, 2^444444444040 is an apocalyptic number.

444444444040 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 444444444040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (527390559360).

444444444040 is an abundant number, since it is smaller than the sum of its proper divisors (610336674680).

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

444444444040 is a wasteful number, since it uses less digits than its factorization.

444444444040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4543 (or 4539 counting only the distinct ones).

The product of its (nonzero) digits is 1048576, while the sum is 40.

Adding to 444444444040 its reverse (40444444444), we get a palindrome (484888888484).

The spelling of 444444444040 in words is "four hundred forty-four billion, four hundred forty-four million, four hundred forty-four thousand, forty".