1143235500 has 192 divisors, whose sum is σ = 3660733440. Its totient is φ = 274944000.

The previous prime is 1143235469. The next prime is 1143235517. The reversal of 1143235500 is 55323411.

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, 3184321 + ... + 3184679.

It is an arithmetic number, because the mean of its divisors is an integer number (19066320).

Almost surely, 2^1143235500 is an apocalyptic number.

1143235500 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 1143235500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1830366720).

1143235500 is an abundant number, since it is smaller than the sum of its proper divisors (2517497940).

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

1143235500 is a wasteful number, since it uses less digits than its factorization.

1143235500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 585 (or 573 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 24.

The square root of 1143235500 is about 33811.7657036719. The cubic root of 1143235500 is about 1045.6312814572.

Adding to 1143235500 its reverse (55323411), we get a palindrome (1198558911).

The spelling of 1143235500 in words is "one billion, one hundred forty-three million, two hundred thirty-five thousand, five hundred".