1143023112 has 144 divisors (see below), whose sum is σ = 3889005120. Its totient is φ = 296873280.

The previous prime is 1143023099. The next prime is 1143023131. The reversal of 1143023112 is 2113203411.

1143023112 is a `hidden beast` number, since 1 + 1 + 430 + 231 + 1 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 51613 + ... + 70355.

It is an arithmetic number, because the mean of its divisors is an integer number (27006980).

Almost surely, 2^1143023112 is an apocalyptic number.

1143023112 is a gapful number since it is divisible by the number (12) 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 1143023112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1944502560).

1143023112 is an abundant number, since it is smaller than the sum of its proper divisors (2745982008).

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

1143023112 is a wasteful number, since it uses less digits than its factorization.

1143023112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18784 (or 18766 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

The square root of 1143023112 is about 33808.6248167535. The cubic root of 1143023112 is about 1045.5665256857.

Adding to 1143023112 its reverse (2113203411), we get a palindrome (3256226523).

The spelling of 1143023112 in words is "one billion, one hundred forty-three million, twenty-three thousand, one hundred twelve".