1218979048 has 64 divisors (see below), whose sum is σ = 2757398400. Its totient is φ = 493516800.

The previous prime is 1218979031. The next prime is 1218979057. The reversal of 1218979048 is 8409798121.

It is a junction number, because it is equal to n+sod(n) for n = 1218978992 and 1218979010.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 425236 + ... + 428092.

It is an arithmetic number, because the mean of its divisors is an integer number (43084350).

Almost surely, 2^1218979048 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1218979048, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1378699200).

1218979048 is an abundant number, since it is smaller than the sum of its proper divisors (1538419352).

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

1218979048 is a wasteful number, since it uses less digits than its factorization.

1218979048 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3290 (or 3286 counting only the distinct ones).

The product of its (nonzero) digits is 290304, while the sum is 49.

The square root of 1218979048 is about 34913.8804488988. The cubic root of 1218979048 is about 1068.2315820569.

The spelling of 1218979048 in words is "one billion, two hundred eighteen million, nine hundred seventy-nine thousand, forty-eight".