1188990166 has 32 divisors (see below), whose sum is σ = 2324185920. Its totient is φ = 442699776.

The previous prime is 1188990163. The next prime is 1188990167. The reversal of 1188990166 is 6610998811.

It is a happy number.

It is a super-2 number, since 2×1188990166² = 2827395229689415112, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1188990163) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 189051 + ... + 195238.

It is an arithmetic number, because the mean of its divisors is an integer number (72630810).

Almost surely, 2^1188990166 is an apocalyptic number.

1188990166 is a deficient number, since it is larger than the sum of its proper divisors (1135195754).

1188990166 is a wasteful number, since it uses less digits than its factorization.

1188990166 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 384328.

The product of its (nonzero) digits is 186624, while the sum is 49.

The square root of 1188990166 is about 34481.7367022022. The cubic root of 1188990166 is about 1059.3986639116.

The spelling of 1188990166 in words is "one billion, one hundred eighty-eight million, nine hundred ninety thousand, one hundred sixty-six".