1187166188 has 36 divisors (see below), whose sum is σ = 2302018488. Its totient is φ = 535167360.

The previous prime is 1187166179. The next prime is 1187166247. The reversal of 1187166188 is 8816617811.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8648 + ... + 49488.

It is an arithmetic number, because the mean of its divisors is an integer number (63944958).

Almost surely, 2^1187166188 is an apocalyptic number.

It is an amenable number.

1187166188 is a deficient number, since it is larger than the sum of its proper divisors (1114852300).

1187166188 is a wasteful number, since it uses less digits than its factorization.

1187166188 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40914 (or 40899 counting only the distinct ones).

The product of its digits is 129024, while the sum is 47.

The square root of 1187166188 is about 34455.2780862381. The cubic root of 1187166188 is about 1058.8566608880.

The spelling of 1187166188 in words is "one billion, one hundred eighty-seven million, one hundred sixty-six thousand, one hundred eighty-eight".