1188884889 has 6 divisors (see below), whose sum is σ = 1717278186. Its totient is φ = 792589920.

The previous prime is 1188884849. The next prime is 1188884897. The reversal of 1188884889 is 9884888811.

It can be written as a sum of positive squares in only one way, i.e., 761760000 + 427124889 = 27600^2 + 20667^2 .

It is not a de Polignac number, because 1188884889 - 2¹¹ = 1188882841 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1188884849) 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 5 ways as a sum of consecutive naturals, for example, 66049152 + ... + 66049169.

It is an arithmetic number, because the mean of its divisors is an integer number (286213031).

Almost surely, 2^1188884889 is an apocalyptic number.

It is an amenable number.

1188884889 is a deficient number, since it is larger than the sum of its proper divisors (528393297).

1188884889 is a wasteful number, since it uses less digits than its factorization.

1188884889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 132098327 (or 132098324 counting only the distinct ones).

The product of its digits is 9437184, while the sum is 63.

The square root of 1188884889 is about 34480.2101066684. The cubic root of 1188884889 is about 1059.3673954710.

The spelling of 1188884889 in words is "one billion, one hundred eighty-eight million, eight hundred eighty-four thousand, eight hundred eighty-nine".