1188418128 has 80 divisors (see below), whose sum is σ = 3192254016. Its totient is φ = 380666880.

The previous prime is 1188418123. The next prime is 1188418159. The reversal of 1188418128 is 8218148811.

It is a happy number.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors.

It is a nude number because it is divisible by every one of its digits.

It is a self number, because there is not a number n which added to its sum of digits gives 1188418128.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1188418123) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 127350 + ... + 136362.

Almost surely, 2^1188418128 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1188418128, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1596127008).

1188418128 is an abundant number, since it is smaller than the sum of its proper divisors (2003835888).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1188418128 is a wasteful number, since it uses less digits than its factorization.

1188418128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9132 (or 9126 counting only the distinct ones).

The product of its digits is 32768, while the sum is 42.

The square root of 1188418128 is about 34473.4409074580. The cubic root of 1188418128 is about 1059.2287400206.

The spelling of 1188418128 in words is "one billion, one hundred eighty-eight million, four hundred eighteen thousand, one hundred twenty-eight".