1143806872 has 48 divisors (see below), whose sum is σ = 2351916000. Its totient is φ = 521179776.

The previous prime is 1143806857. The next prime is 1143806879. The reversal of 1143806872 is 2786083411.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1143806879) 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 11 ways as a sum of consecutive naturals, for example, 101454 + ... + 112162.

It is an arithmetic number, because the mean of its divisors is an integer number (48998250).

Almost surely, 2^1143806872 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1143806872, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1175958000).

1143806872 is an abundant number, since it is smaller than the sum of its proper divisors (1208109128).

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

1143806872 is a wasteful number, since it uses less digits than its factorization.

1143806872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10820 (or 10803 counting only the distinct ones).

The product of its (nonzero) digits is 64512, while the sum is 40.

The square root of 1143806872 is about 33820.2139555621. The cubic root of 1143806872 is about 1045.8054494022.

The spelling of 1143806872 in words is "one billion, one hundred forty-three million, eight hundred six thousand, eight hundred seventy-two".