1444443520 has 128 divisors (see below), whose sum is σ = 3748500000. Its totient is φ = 529072128.

The previous prime is 1444443499. The next prime is 1444443523. The reversal of 1444443520 is 253444441.

It is a tau number, because it is divible by the number of its divisors (128).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1444443523) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1155856 + ... + 1157104.

Almost surely, 2^1444443520 is an apocalyptic number.

1444443520 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 1444443520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1874250000).

1444443520 is an abundant number, since it is smaller than the sum of its proper divisors (2304056480).

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

1444443520 is a wasteful number, since it uses less digits than its factorization.

1444443520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1420 (or 1408 counting only the distinct ones).

The product of its (nonzero) digits is 30720, while the sum is 31.

The square root of 1444443520 is about 38005.8353414315. The cubic root of 1444443520 is about 1130.4035731852.

Adding to 1444443520 its reverse (253444441), we get a palindrome (1697887961).

It can be divided in two parts, 144 and 4443520, that added together give a square (4443664 = 2108²).

The spelling of 1444443520 in words is "one billion, four hundred forty-four million, four hundred forty-three thousand, five hundred twenty".