1188644 has 6 divisors (see below), whose sum is σ = 2080134. Its totient is φ = 594320.

The previous prime is 1188637. The next prime is 1188653. The reversal of 1188644 is 4468811.

It can be written as a sum of positive squares in only one way, i.e., 1183744 + 4900 = 1088^2 + 70^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 1188644.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 148577 + ... + 148584.

It is an arithmetic number, because the mean of its divisors is an integer number (346689).

2^1188644 is an apocalyptic number.

It is an amenable number.

1188644 is a deficient number, since it is larger than the sum of its proper divisors (891490).

1188644 is a wasteful number, since it uses less digits than its factorization.

1188644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 297165 (or 297163 counting only the distinct ones).

The product of its digits is 6144, while the sum is 32.

The square root of 1188644 is about 1090.2495127263. The cubic root of 1188644 is about 105.9295841813.

The spelling of 1188644 in words is "one million, one hundred eighty-eight thousand, six hundred forty-four".