1216808182 has 8 divisors (see below), whose sum is σ = 1841364936. Its totient is φ = 603019872.

The previous prime is 1216808179. The next prime is 1216808183. The reversal of 1216808182 is 2818086121.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1216808183) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2691828 + ... + 2692279.

It is an arithmetic number, because the mean of its divisors is an integer number (230170617).

Almost surely, 2^1216808182 is an apocalyptic number.

1216808182 is a deficient number, since it is larger than the sum of its proper divisors (624556754).

1216808182 is a wasteful number, since it uses less digits than its factorization.

1216808182 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5384222.

The product of its (nonzero) digits is 12288, while the sum is 37.

The square root of 1216808182 is about 34882.7777276982. Note that the first 4 decimals coincide. The cubic root of 1216808182 is about 1067.5970713958.

The spelling of 1216808182 in words is "one billion, two hundred sixteen million, eight hundred eight thousand, one hundred eighty-two".