1143223320 has 128 divisors (see below), whose sum is σ = 3479581440. Its totient is φ = 300464640.

The previous prime is 1143223313. The next prime is 1143223339. The reversal of 1143223320 is 233223411.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4127022 + ... + 4127298.

It is an arithmetic number, because the mean of its divisors is an integer number (27184230).

Almost surely, 2^1143223320 is an apocalyptic number.

1143223320 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 1143223320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1739790720).

1143223320 is an abundant number, since it is smaller than the sum of its proper divisors (2336358120).

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

1143223320 is a wasteful number, since it uses less digits than its factorization.

1143223320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 665 (or 661 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 21.

The square root of 1143223320 is about 33811.5855883749. The cubic root of 1143223320 is about 1045.6275680682.

Adding to 1143223320 its reverse (233223411), we get a palindrome (1376446731).

Subtracting from 1143223320 its reverse (233223411), we obtain a palindrome (909999909).

The spelling of 1143223320 in words is "one billion, one hundred forty-three million, two hundred twenty-three thousand, three hundred twenty".