1444774440 has 128 divisors (see below), whose sum is σ = 4760985600. Its totient is φ = 349113600.

The previous prime is 1444774439. The next prime is 1444774453. The reversal of 1444774440 is 444774441.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 38665 + ... + 66215.

It is an arithmetic number, because the mean of its divisors is an integer number (37195200).

Almost surely, 2^1444774440 is an apocalyptic number.

1444774440 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 1444774440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2380492800).

1444774440 is an abundant number, since it is smaller than the sum of its proper divisors (3316211160).

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

1444774440 is a wasteful number, since it uses less digits than its factorization.

1444774440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27607 (or 27603 counting only the distinct ones).

The product of its (nonzero) digits is 200704, while the sum is 39.

The square root of 1444774440 is about 38010.1886341018. The cubic root of 1444774440 is about 1130.4898912222.

Subtracting from 1444774440 its reverse (444774441), we obtain a palindrome (999999999).

The spelling of 1444774440 in words is "one billion, four hundred forty-four million, seven hundred seventy-four thousand, four hundred forty".