1218094868 has 6 divisors (see below), whose sum is σ = 2131666026. Its totient is φ = 609047432.

The previous prime is 1218094837. The next prime is 1218094937. The reversal of 1218094868 is 8684908121.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 1217451664 + 643204 = 34892^2 + 802^2 .

It is a congruent number.

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 as a sum of consecutive naturals, namely, 152261855 + ... + 152261862.

It is an arithmetic number, because the mean of its divisors is an integer number (355277671).

Almost surely, 2^1218094868 is an apocalyptic number.

It is an amenable number.

1218094868 is a deficient number, since it is larger than the sum of its proper divisors (913571158).

1218094868 is a wasteful number, since it uses less digits than its factorization.

1218094868 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 304523721 (or 304523719 counting only the distinct ones).

The product of its (nonzero) digits is 221184, while the sum is 47.

The square root of 1218094868 is about 34901.2158527464. The cubic root of 1218094868 is about 1067.9732408769.

The spelling of 1218094868 in words is "one billion, two hundred eighteen million, ninety-four thousand, eight hundred sixty-eight".