1218974508 has 72 divisors (see below), whose sum is σ = 3201765840. Its totient is φ = 405518400.

The previous prime is 1218974489. The next prime is 1218974521. The reversal of 1218974508 is 8054798121.

1218974508 is a `hidden beast` number, since 12 + 189 + 7 + 450 + 8 = 666.

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 23 ways as a sum of consecutive naturals, for example, 680478 + ... + 682266.

It is an arithmetic number, because the mean of its divisors is an integer number (44468970).

Almost surely, 2^1218974508 is an apocalyptic number.

1218974508 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1218974508, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1600882920).

1218974508 is an abundant number, since it is smaller than the sum of its proper divisors (1982791332).

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

1218974508 is a wasteful number, since it uses less digits than its factorization.

1218974508 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2509 (or 2495 counting only the distinct ones).

The product of its (nonzero) digits is 161280, while the sum is 45.

The square root of 1218974508 is about 34913.8154317170. The cubic root of 1218974508 is about 1068.2302558713.

The spelling of 1218974508 in words is "one billion, two hundred eighteen million, nine hundred seventy-four thousand, five hundred eight".