1181111140 has 48 divisors (see below), whose sum is σ = 2708173440. Its totient is φ = 429121280.

The previous prime is 1181111119. The next prime is 1181111153. The reversal of 1181111140 is 411111811.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 447264 + ... + 449896.

It is an arithmetic number, because the mean of its divisors is an integer number (56420280).

Almost surely, 2^1181111140 is an apocalyptic number.

1181111140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1181111140 is an abundant number, since it is smaller than the sum of its proper divisors (1527062300).

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

1181111140 is a wasteful number, since it uses less digits than its factorization.

1181111140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4692 (or 4690 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 19.

The square root of 1181111140 is about 34367.2975370482. The cubic root of 1181111140 is about 1057.0533864764.

Adding to 1181111140 its reverse (411111811), we get a palindrome (1592222951).

The spelling of 1181111140 in words is "one billion, one hundred eighty-one million, one hundred eleven thousand, one hundred forty".