1143982836 has 144 divisors (see below), whose sum is σ = 3243240000. Its totient is φ = 338236416.

The previous prime is 1143982823. The next prime is 1143982871. The reversal of 1143982836 is 6382893411.

It is a junction number, because it is equal to n+sod(n) for n = 1143982791 and 1143982800.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 762415 + ... + 763913.

It is an arithmetic number, because the mean of its divisors is an integer number (22522500).

Almost surely, 2^1143982836 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 1143982836, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1621620000).

1143982836 is an abundant number, since it is smaller than the sum of its proper divisors (2099257164).

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

1143982836 is a wasteful number, since it uses less digits than its factorization.

1143982836 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1598 (or 1593 counting only the distinct ones).

The product of its digits is 248832, while the sum is 45.

The square root of 1143982836 is about 33822.8153174747. The cubic root of 1143982836 is about 1045.8590757845.

The spelling of 1143982836 in words is "one billion, one hundred forty-three million, nine hundred eighty-two thousand, eight hundred thirty-six".