1143240756 has 36 divisors (see below), whose sum is σ = 3103083648. Its totient is φ = 326640048.

The previous prime is 1143240743. The next prime is 1143240757. The reversal of 1143240756 is 6570423411.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1143240757) 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 11 ways as a sum of consecutive naturals, for example, 971556 + ... + 972731.

It is an arithmetic number, because the mean of its divisors is an integer number (86196768).

Almost surely, 2^1143240756 is an apocalyptic number.

It is an amenable number.

1143240756 is an abundant number, since it is smaller than the sum of its proper divisors (1959842892).

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

1143240756 is a wasteful number, since it uses less digits than its factorization.

1143240756 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1944308 (or 1944299 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 33.

The square root of 1143240756 is about 33811.8434280061. The cubic root of 1143240756 is about 1045.6328838770.

The spelling of 1143240756 in words is "one billion, one hundred forty-three million, two hundred forty thousand, seven hundred fifty-six".