1143400885 has 8 divisors (see below), whose sum is σ = 1496815776. Its totient is φ = 831564240.

The previous prime is 1143400883. The next prime is 1143400927. The reversal of 1143400885 is 5880043411.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1143400885 - 2¹ = 1143400883 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1143400885.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1143400883) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10394499 + ... + 10394608.

It is an arithmetic number, because the mean of its divisors is an integer number (187101972).

Almost surely, 2^1143400885 is an apocalyptic number.

It is an amenable number.

1143400885 is a deficient number, since it is larger than the sum of its proper divisors (353414891).

1143400885 is a wasteful number, since it uses less digits than its factorization.

1143400885 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20789123.

The product of its (nonzero) digits is 15360, while the sum is 34.

The square root of 1143400885 is about 33814.2112875637. The cubic root of 1143400885 is about 1045.6817007543.

The spelling of 1143400885 in words is "one billion, one hundred forty-three million, four hundred thousand, eight hundred eighty-five".