1143446220 has 576 divisors, whose sum is σ = 4549708800. Its totient is φ = 235146240.

The previous prime is 1143446203. The next prime is 1143446303. The reversal of 1143446220 is 226443411.

It is a happy number.

1143446220 is a `hidden beast` number, since 1 + 1 + 4 + 34 + 4 + 622 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 18744990 + ... + 18745050.

It is an arithmetic number, because the mean of its divisors is an integer number (7898800).

Almost surely, 2^1143446220 is an apocalyptic number.

1143446220 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 1143446220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2274854400).

1143446220 is an abundant number, since it is smaller than the sum of its proper divisors (3406262580).

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

1143446220 is a wasteful number, since it uses less digits than its factorization.

1143446220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 140 (or 126 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 27.

The square root of 1143446220 is about 33814.8816351618. The cubic root of 1143446220 is about 1045.6955207406.

Adding to 1143446220 its reverse (226443411), we get a palindrome (1369889631).

The spelling of 1143446220 in words is "one billion, one hundred forty-three million, four hundred forty-six thousand, two hundred twenty".