1218991076 has 12 divisors (see below), whose sum is σ = 2225983872. Its totient is φ = 582995688.

The previous prime is 1218991057. The next prime is 1218991079. The reversal of 1218991076 is 6701998121.

It is not an unprimeable number, because it can be changed into a prime (1218991079) by changing a digit.

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, 6624860 + ... + 6625043.

It is an arithmetic number, because the mean of its divisors is an integer number (185498656).

Almost surely, 2^1218991076 is an apocalyptic number.

It is an amenable number.

1218991076 is a deficient number, since it is larger than the sum of its proper divisors (1006992796).

1218991076 is a wasteful number, since it uses less digits than its factorization.

1218991076 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13249930 (or 13249928 counting only the distinct ones).

The product of its (nonzero) digits is 54432, while the sum is 44.

The square root of 1218991076 is about 34914.0527008825. The cubic root of 1218991076 is about 1068.2350955565.

The spelling of 1218991076 in words is "one billion, two hundred eighteen million, nine hundred ninety-one thousand, seventy-six".