1443221540 has 48 divisors (see below), whose sum is σ = 3182155200. Its totient is φ = 549048192.

The previous prime is 1443221501. The next prime is 1443221561. The reversal of 1443221540 is 451223441.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20291 + ... + 57429.

It is an arithmetic number, because the mean of its divisors is an integer number (66294900).

Almost surely, 2^1443221540 is an apocalyptic number.

1443221540 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 1443221540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1591077600).

1443221540 is an abundant number, since it is smaller than the sum of its proper divisors (1738933660).

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

1443221540 is a wasteful number, since it uses less digits than its factorization.

1443221540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37244 (or 37242 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 26.

The square root of 1443221540 is about 37989.7557244055. The cubic root of 1443221540 is about 1130.0847144571.

Adding to 1443221540 its reverse (451223441), we get a palindrome (1894444981).

The spelling of 1443221540 in words is "one billion, four hundred forty-three million, two hundred twenty-one thousand, five hundred forty".