1445321444 has 36 divisors (see below), whose sum is σ = 2963484720. Its totient is φ = 614955600.

The previous prime is 1445321411. The next prime is 1445321447. The reversal of 1445321444 is 4441235441.

It is a self number, because there is not a number n which added to its sum of digits gives 1445321444.

It is not an unprimeable number, because it can be changed into a prime (1445321447) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 719 + ... + 53769.

It is an arithmetic number, because the mean of its divisors is an integer number (82319020).

Almost surely, 2^1445321444 is an apocalyptic number.

1445321444 is a gapful number since it is divisible by the number (14) 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 1445321444, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1481742360).

1445321444 is an abundant number, since it is smaller than the sum of its proper divisors (1518163276).

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

1445321444 is a wasteful number, since it uses less digits than its factorization.

1445321444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53208 (or 53199 counting only the distinct ones).

The product of its digits is 30720, while the sum is 32.

The square root of 1445321444 is about 38017.3834449453. The cubic root of 1445321444 is about 1130.6325442782.

Adding to 1445321444 its reverse (4441235441), we get a palindrome (5886556885).

The spelling of 1445321444 in words is "one billion, four hundred forty-five million, three hundred twenty-one thousand, four hundred forty-four".