1143231440 has 40 divisors (see below), whose sum is σ = 2862478248. Its totient is φ = 422115840.

The previous prime is 1143231409. The next prime is 1143231451. The reversal of 1143231440 is 441323411.

It can be written as a sum of positive squares in 4 ways, for example, as 28472896 + 1114758544 = 5336^2 + 33388^2 .

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

It is a congruent number.

It is an unprimeable number.

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, 548591 + ... + 550670.

Almost surely, 2^1143231440 is an apocalyptic number.

1143231440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1143231440 is an abundant number, since it is smaller than the sum of its proper divisors (1719246808).

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

1143231440 is a wasteful number, since it uses less digits than its factorization.

1143231440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1099287 (or 1099281 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 23.

The square root of 1143231440 is about 33811.7056653461. The cubic root of 1143231440 is about 1045.6300436638.

Adding to 1143231440 its reverse (441323411), we get a palindrome (1584554851).

The spelling of 1143231440 in words is "one billion, one hundred forty-three million, two hundred thirty-one thousand, four hundred forty".