1189183428 has 18 divisors (see below), whose sum is σ = 3005991534. Its totient is φ = 396394464.

The previous prime is 1189183417. The next prime is 1189183433. The reversal of 1189183428 is 8243819811.

It can be written as a sum of positive squares in only one way, i.e., 661929984 + 527253444 = 25728^2 + 22962^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is an unprimeable number.

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, 16516401 + ... + 16516472.

Almost surely, 2^1189183428 is an apocalyptic number.

1189183428 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

1189183428 is an abundant number, since it is smaller than the sum of its proper divisors (1816808106).

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

1189183428 is a wasteful number, since it uses less digits than its factorization.

1189183428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33032883 (or 33032878 counting only the distinct ones).

The product of its digits is 110592, while the sum is 45.

The square root of 1189183428 is about 34484.5389703850. The cubic root of 1189183428 is about 1059.4560600725.

The spelling of 1189183428 in words is "one billion, one hundred eighty-nine million, one hundred eighty-three thousand, four hundred twenty-eight".