1188888868 has 6 divisors (see below), whose sum is σ = 2080555526. Its totient is φ = 594444432.

The previous prime is 1188888851. The next prime is 1188888887. The reversal of 1188888868 is 8688888811.

It can be written as a sum of positive squares in only one way, i.e., 964847844 + 224041024 = 31062^2 + 14968^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 148611105 + ... + 148611112.

Almost surely, 2^1188888868 is an apocalyptic number.

It is an amenable number.

1188888868 is a deficient number, since it is larger than the sum of its proper divisors (891666658).

1188888868 is a wasteful number, since it uses less digits than its factorization.

1188888868 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 297222221 (or 297222219 counting only the distinct ones).

The product of its digits is 12582912, while the sum is 64.

The square root of 1188888868 is about 34480.2678063846. The cubic root of 1188888868 is about 1059.3685773119.

The spelling of 1188888868 in words is "one billion, one hundred eighty-eight million, eight hundred eighty-eight thousand, eight hundred sixty-eight".