1143988164 has 96 divisors (see below), whose sum is σ = 3340001280. Its totient is φ = 335469600.

The previous prime is 1143988159. The next prime is 1143988169. The reversal of 1143988164 is 4618893411.

It is an interprime number because it is at equal distance from previous prime (1143988159) and next prime (1143988169).

It is not an unprimeable number, because it can be changed into a prime (1143988169) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 21297 + ... + 52359.

It is an arithmetic number, because the mean of its divisors is an integer number (34791680).

Almost surely, 2^1143988164 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1143988164, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1670000640).

1143988164 is an abundant number, since it is smaller than the sum of its proper divisors (2196013116).

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

1143988164 is a wasteful number, since it uses less digits than its factorization.

1143988164 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31118 (or 31110 counting only the distinct ones).

The product of its digits is 165888, while the sum is 45.

The square root of 1143988164 is about 33822.8940807850. The cubic root of 1143988164 is about 1045.8606994478.

The spelling of 1143988164 in words is "one billion, one hundred forty-three million, nine hundred eighty-eight thousand, one hundred sixty-four".