1218242308 has 12 divisors (see below), whose sum is σ = 2132182080. Its totient is φ = 609047432.

The previous prime is 1218242273. The next prime is 1218242329. The reversal of 1218242308 is 8032428121.

It is a happy number.

It is a super-2 number, since 2×1218242308² = 2968228642002333728, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1218242308.

It is an unprimeable number.

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, 37833 + ... + 62191.

It is an arithmetic number, because the mean of its divisors is an integer number (177681840).

Almost surely, 2^1218242308 is an apocalyptic number.

It is an amenable number.

1218242308 is a deficient number, since it is larger than the sum of its proper divisors (913939772).

1218242308 is a wasteful number, since it uses less digits than its factorization.

1218242308 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36866 (or 36864 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 31.

The square root of 1218242308 is about 34903.3280361630. The cubic root of 1218242308 is about 1068.0163288240.

The spelling of 1218242308 in words is "one billion, two hundred eighteen million, two hundred forty-two thousand, three hundred eight".