1218440968 has 16 divisors (see below), whose sum is σ = 2404818000. Its totient is φ = 577156176.

The previous prime is 1218440953. The next prime is 1218441013. The reversal of 1218440968 is 8690448121.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4007878 + ... + 4008181.

It is an arithmetic number, because the mean of its divisors is an integer number (150301125).

Almost surely, 2^1218440968 is an apocalyptic number.

It is an amenable number.

1218440968 is a deficient number, since it is larger than the sum of its proper divisors (1186377032).

1218440968 is a wasteful number, since it uses less digits than its factorization.

1218440968 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8016084 (or 8016080 counting only the distinct ones).

The product of its (nonzero) digits is 110592, while the sum is 43.

The square root of 1218440968 is about 34906.1737805793. The cubic root of 1218440968 is about 1068.0743798348.

The spelling of 1218440968 in words is "one billion, two hundred eighteen million, four hundred forty thousand, nine hundred sixty-eight".