1218085356 has 48 divisors (see below), whose sum is σ = 2955115520. Its totient is φ = 390087360.

The previous prime is 1218085331. The next prime is 1218085361. The reversal of 1218085356 is 6535808121.

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 15 ways as a sum of consecutive naturals, for example, 39930 + ... + 63486.

Almost surely, 2^1218085356 is an apocalyptic number.

It is an amenable number.

1218085356 is an abundant number, since it is smaller than the sum of its proper divisors (1737030164).

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

1218085356 is a wasteful number, since it uses less digits than its factorization.

1218085356 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23734 (or 23732 counting only the distinct ones).

The product of its (nonzero) digits is 57600, while the sum is 39.

The square root of 1218085356 is about 34901.0795821562. The cubic root of 1218085356 is about 1067.9704609653.

The spelling of 1218085356 in words is "one billion, two hundred eighteen million, eighty-five thousand, three hundred fifty-six".