1218327312 has 40 divisors (see below), whose sum is σ = 3148923456. Its totient is φ = 405905536.

The previous prime is 1218327277. The next prime is 1218327317. The reversal of 1218327312 is 2137238121.

It is a self number, because there is not a number n which added to its sum of digits gives 1218327312.

It is not an unprimeable number, because it can be changed into a prime (1218327317) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 113773 + ... + 124019.

Almost surely, 2^1218327312 is an apocalyptic number.

1218327312 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1218327312 is an abundant number, since it is smaller than the sum of its proper divisors (1930596144).

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

1218327312 is a wasteful number, since it uses less digits than its factorization.

1218327312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12735 (or 12729 counting only the distinct ones).

The product of its digits is 4032, while the sum is 30.

The square root of 1218327312 is about 34904.5457211521. The cubic root of 1218327312 is about 1068.0411688601.

The spelling of 1218327312 in words is "one billion, two hundred eighteen million, three hundred twenty-seven thousand, three hundred twelve".