1218733242 has 16 divisors (see below), whose sum is σ = 2437823520. Its totient is φ = 406184912.

The previous prime is 1218733199. The next prime is 1218733277. The reversal of 1218733242 is 2423378121.

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 in 7 ways as a sum of consecutive naturals, for example, 54109 + ... + 73247.

It is an arithmetic number, because the mean of its divisors is an integer number (152363970).

Almost surely, 2^1218733242 is an apocalyptic number.

1218733242 is an abundant number, since it is smaller than the sum of its proper divisors (1219090278).

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

1218733242 is a wasteful number, since it uses less digits than its factorization.

1218733242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29757.

The product of its digits is 16128, while the sum is 33.

The square root of 1218733242 is about 34910.3600955361. The cubic root of 1218733242 is about 1068.1597745925.

The spelling of 1218733242 in words is "one billion, two hundred eighteen million, seven hundred thirty-three thousand, two hundred forty-two".