1143199980 has 240 divisors, whose sum is σ = 4066819680. Its totient is φ = 266499072.

The previous prime is 1143199979. The next prime is 1143199991. The reversal of 1143199980 is 899913411.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 398712 + ... + 401568.

It is an arithmetic number, because the mean of its divisors is an integer number (16945082).

Almost surely, 2^1143199980 is an apocalyptic number.

1143199980 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 1143199980, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2033409840).

1143199980 is an abundant number, since it is smaller than the sum of its proper divisors (2923619700).

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

1143199980 is a wasteful number, since it uses less digits than its factorization.

1143199980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2910 (or 2899 counting only the distinct ones).

The product of its (nonzero) digits is 69984, while the sum is 45.

The square root of 1143199980 is about 33811.2404386470. The cubic root of 1143199980 is about 1045.6204521901.

The spelling of 1143199980 in words is "one billion, one hundred forty-three million, one hundred ninety-nine thousand, nine hundred eighty".