1188226863 has 12 divisors (see below), whose sum is σ = 1758189888. Its totient is φ = 772830240.

The previous prime is 1188226841. The next prime is 1188226867. The reversal of 1188226863 is 3686228811.

It is not a de Polignac number, because 1188226863 - 2⁸ = 1188226607 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1188226867) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1609695 + ... + 1610432.

It is an arithmetic number, because the mean of its divisors is an integer number (146515824).

Almost surely, 2^1188226863 is an apocalyptic number.

1188226863 is a deficient number, since it is larger than the sum of its proper divisors (569963025).

1188226863 is a wasteful number, since it uses less digits than its factorization.

1188226863 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3220174 (or 3220171 counting only the distinct ones).

The product of its digits is 221184, while the sum is 45.

The square root of 1188226863 is about 34470.6667037352. Note that the first 3 decimals coincide. The cubic root of 1188226863 is about 1059.1719125876.

The spelling of 1188226863 in words is "one billion, one hundred eighty-eight million, two hundred twenty-six thousand, eight hundred sixty-three".