1143403720 has 16 divisors (see below), whose sum is σ = 2572658460. Its totient is φ = 457361472.

The previous prime is 1143403693. The next prime is 1143403727. The reversal of 1143403720 is 273043411.

It can be written as a sum of positive squares in 2 ways, for example, as 1141493796 + 1909924 = 33786^2 + 1382^2 .

It is not an unprimeable number, because it can be changed into a prime (1143403727) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 14292507 + ... + 14292586.

Almost surely, 2^1143403720 is an apocalyptic number.

1143403720 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1143403720 is an abundant number, since it is smaller than the sum of its proper divisors (1429254740).

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

1143403720 is a wasteful number, since it uses less digits than its factorization.

1143403720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28585104 (or 28585100 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 25.

The square root of 1143403720 is about 33814.2532077821. The cubic root of 1143403720 is about 1045.6825649905.

The spelling of 1143403720 in words is "one billion, one hundred forty-three million, four hundred three thousand, seven hundred twenty".