1143323020 has 24 divisors (see below), whose sum is σ = 2743975584. Its totient is φ = 391996416.

The previous prime is 1143323017. The next prime is 1143323029. The reversal of 1143323020 is 203233411.

It is not an unprimeable number, because it can be changed into a prime (1143323029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4083157 + ... + 4083436.

It is an arithmetic number, because the mean of its divisors is an integer number (114332316).

Almost surely, 2^1143323020 is an apocalyptic number.

1143323020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1143323020 is an abundant number, since it is smaller than the sum of its proper divisors (1600652564).

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

1143323020 is a wasteful number, since it uses less digits than its factorization.

1143323020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8166609 (or 8166607 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 19.

The square root of 1143323020 is about 33813.0599029428. The cubic root of 1143323020 is about 1045.6579634239.

Adding to 1143323020 its reverse (203233411), we get a palindrome (1346556431).

It can be divided in two parts, 11433 and 23020, that added together give a triangular number (34453 = T₂₆₂).

The spelling of 1143323020 in words is "one billion, one hundred forty-three million, three hundred twenty-three thousand, twenty".