1143971886 has 16 divisors (see below), whose sum is σ = 2326723200. Its totient is φ = 374860728.

The previous prime is 1143971879. The next prime is 1143971891. The reversal of 1143971886 is 6881793411.

It is a Curzon number.

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 7 ways as a sum of consecutive naturals, for example, 1615426 + ... + 1616133.

It is an arithmetic number, because the mean of its divisors is an integer number (145420200).

Almost surely, 2^1143971886 is an apocalyptic number.

1143971886 is an abundant number, since it is smaller than the sum of its proper divisors (1182751314).

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

1143971886 is a wasteful number, since it uses less digits than its factorization.

1143971886 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3231623.

The product of its digits is 290304, while the sum is 48.

The square root of 1143971886 is about 33822.6534441046. The cubic root of 1143971886 is about 1045.8557388483.

The spelling of 1143971886 in words is "one billion, one hundred forty-three million, nine hundred seventy-one thousand, eight hundred eighty-six".