1188306 has 24 divisors (see below), whose sum is σ = 2942784. Its totient is φ = 339480.

The previous prime is 1188293. The next prime is 1188307. The reversal of 1188306 is 6038811.

It is a super-2 number, since 2×1188306² = 2824142299272, which contains 22 as substring.

It is an Ulam number.

It is a self number, because there is not a number n which added to its sum of digits gives 1188306.

It is not an unprimeable number, because it can be changed into a prime (1188307) 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, 4590 + ... + 4841.

It is an arithmetic number, because the mean of its divisors is an integer number (122616).

2^1188306 is an apocalyptic number.

1188306 is an abundant number, since it is smaller than the sum of its proper divisors (1754478).

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

1188306 is a wasteful number, since it uses less digits than its factorization.

1188306 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9446 (or 9443 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 27.

The square root of 1188306 is about 1090.0944913172. The cubic root of 1188306 is about 105.9195426006.

The spelling of 1188306 in words is "one million, one hundred eighty-eight thousand, three hundred six".