1143489000 has 128 divisors (see below), whose sum is σ = 3621571200. Its totient is φ = 300326400.

The previous prime is 1143488993. The next prime is 1143489007. The reversal of 1143489000 is 9843411.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1143488993) and next prime (1143489007).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is not an unprimeable number, because it can be changed into a prime (1143489007) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 198156 + ... + 203844.

It is an arithmetic number, because the mean of its divisors is an integer number (28293525).

Almost surely, 2^1143489000 is an apocalyptic number.

1143489000 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 1143489000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1810785600).

1143489000 is an abundant number, since it is smaller than the sum of its proper divisors (2478082200).

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

1143489000 is a wasteful number, since it uses less digits than its factorization.

1143489000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5780 (or 5766 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 30.

The square root of 1143489000 is about 33815.5141909745. The cubic root of 1143489000 is about 1045.7085615219.

The spelling of 1143489000 in words is "one billion, one hundred forty-three million, four hundred eighty-nine thousand".