1143423320 has 64 divisors (see below), whose sum is σ = 2835090720. Its totient is φ = 412360704.

The previous prime is 1143423319. The next prime is 1143423331. The reversal of 1143423320 is 233243411.

It is a congruent number.

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, 3209 + ... + 47928.

Almost surely, 2^1143423320 is an apocalyptic number.

1143423320 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 1143423320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1417545360).

1143423320 is an abundant number, since it is smaller than the sum of its proper divisors (1691667400).

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

1143423320 is a wasteful number, since it uses less digits than its factorization.

1143423320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51204 (or 51200 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 23.

The square root of 1143423320 is about 33814.5430251541. The cubic root of 1143423320 is about 1045.6885399175.

Adding to 1143423320 its reverse (233243411), we get a palindrome (1376666731).

The spelling of 1143423320 in words is "one billion, one hundred forty-three million, four hundred twenty-three thousand, three hundred twenty".