1443323420 has 192 divisors, whose sum is σ = 3986841600. Its totient is φ = 434649600.

The previous prime is 1443323419. The next prime is 1443323459. The reversal of 1443323420 is 243233441.

It is a self number, because there is not a number n which added to its sum of digits gives 1443323420.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 2338952 + ... + 2339568.

It is an arithmetic number, because the mean of its divisors is an integer number (20764800).

Almost surely, 2^1443323420 is an apocalyptic number.

1443323420 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 1443323420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1993420800).

1443323420 is an abundant number, since it is smaller than the sum of its proper divisors (2543518180).

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

1443323420 is a wasteful number, since it uses less digits than its factorization.

1443323420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 689 (or 673 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 26.

The square root of 1443323420 is about 37991.0965885430. The cubic root of 1443323420 is about 1130.1113055056. Note that the first 3 decimals are identical.

Adding to 1443323420 its reverse (243233441), we get a palindrome (1686556861).

The spelling of 1443323420 in words is "one billion, four hundred forty-three million, three hundred twenty-three thousand, four hundred twenty".