1143303440 has 40 divisors (see below), whose sum is σ = 2661109440. Its totient is φ = 456817536.

The previous prime is 1143303437. The next prime is 1143303449. The reversal of 1143303440 is 443033411.

It is a tau number, because it is divible by the number of its divisors (40).

It is not an unprimeable number, because it can be changed into a prime (1143303449) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 69971 + ... + 84749.

It is an arithmetic number, because the mean of its divisors is an integer number (66527736).

Almost surely, 2^1143303440 is an apocalyptic number.

1143303440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1143303440 is an abundant number, since it is smaller than the sum of its proper divisors (1517806000).

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

1143303440 is a wasteful number, since it uses less digits than its factorization.

1143303440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15759 (or 15753 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 23.

The square root of 1143303440 is about 33812.7703686048. The cubic root of 1143303440 is about 1045.6519942447.

Adding to 1143303440 its reverse (443033411), we get a palindrome (1586336851).

The spelling of 1143303440 in words is "one billion, one hundred forty-three million, three hundred three thousand, four hundred forty".