1143331440 has 80 divisors (see below), whose sum is σ = 3548025888. Its totient is φ = 304570368.

The previous prime is 1143331439. The next prime is 1143331459. The reversal of 1143331440 is 441333411.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 1143331440.

It is a congruent number.

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 15 ways as a sum of consecutive naturals, for example, 309444 + ... + 313116.

Almost surely, 2^1143331440 is an apocalyptic number.

1143331440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1143331440 is an abundant number, since it is smaller than the sum of its proper divisors (2404694448).

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

1143331440 is a wasteful number, since it uses less digits than its factorization.

1143331440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4986 (or 4980 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 24.

The square root of 1143331440 is about 33813.1844108182. The cubic root of 1143331440 is about 1045.6605303329.

Adding to 1143331440 its reverse (441333411), we get a palindrome (1584664851).

The spelling of 1143331440 in words is "one billion, one hundred forty-three million, three hundred thirty-one thousand, four hundred forty".