1181111982 has 16 divisors (see below), whose sum is σ = 2380257792. Its totient is φ = 390698360.

The previous prime is 1181111963. The next prime is 1181111993. The reversal of 1181111982 is 2891111811.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 750558 + ... + 752129.

It is an arithmetic number, because the mean of its divisors is an integer number (148766112).

Almost surely, 2^1181111982 is an apocalyptic number.

1181111982 is an abundant number, since it is smaller than the sum of its proper divisors (1199145810).

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

1181111982 is a wasteful number, since it uses less digits than its factorization.

1181111982 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1502823.

The product of its digits is 1152, while the sum is 33.

The square root of 1181111982 is about 34367.3097870636. The cubic root of 1181111982 is about 1057.0536376632.

The spelling of 1181111982 in words is "one billion, one hundred eighty-one million, one hundred eleven thousand, nine hundred eighty-two".