1442443440 has 80 divisors (see below), whose sum is σ = 4481998848. Its totient is φ = 383755008.

The previous prime is 1442443439. The next prime is 1442443451. The reversal of 1442443440 is 443442441.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 1442443398 and 1442443407.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 99537 + ... + 113103.

Almost surely, 2^1442443440 is an apocalyptic number.

1442443440 is a gapful number since it is divisible by the number (10) 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 1442443440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2240999424).

1442443440 is an abundant number, since it is smaller than the sum of its proper divisors (3039555408).

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

1442443440 is a wasteful number, since it uses less digits than its factorization.

1442443440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14026 (or 14020 counting only the distinct ones).

The product of its (nonzero) digits is 24576, while the sum is 30.

The square root of 1442443440 is about 37979.5134250032. The cubic root of 1442443440 is about 1129.8815862552.

Adding to 1442443440 its reverse (443442441), we get a palindrome (1885885881).

Subtracting from 1442443440 its reverse (443442441), we obtain a palindrome (999000999).

The spelling of 1442443440 in words is "one billion, four hundred forty-two million, four hundred forty-three thousand, four hundred forty".