1143442220 has 24 divisors (see below), whose sum is σ = 2435051808. Its totient is φ = 450934400.

The previous prime is 1143442177. The next prime is 1143442327. The reversal of 1143442220 is 222443411.

It is a super-2 number, since 2×1143442220² = 2614920220957056800, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 401201 + ... + 404040.

It is an arithmetic number, because the mean of its divisors is an integer number (101460492).

Almost surely, 2^1143442220 is an apocalyptic number.

1143442220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1143442220 is an abundant number, since it is smaller than the sum of its proper divisors (1291609588).

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

1143442220 is a wasteful number, since it uses less digits than its factorization.

1143442220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 805321 (or 805319 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 23.

The square root of 1143442220 is about 33814.8224895533. The cubic root of 1143442220 is about 1045.6943013895.

Adding to 1143442220 its reverse (222443411), we get a palindrome (1365885631).

The spelling of 1143442220 in words is "one billion, one hundred forty-three million, four hundred forty-two thousand, two hundred twenty".